Home / 11,215.38-15,460.62-7,181.76

Finding the Fourth Proportional to 11,215.38, 15,460.62 and 7,181.76

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Solution

The fourth proportional to 11,215.38, 15,460.62 and 7,181.76 is: 9,900.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,215.38 : 15,460.62 = 7,181.76 : x
  2. Step 2: Convert to fraction form
    11,215.38/15,460.62 = 7,181.76/x
  3. Step 3: Cross multiply
    11,215.38x = 15,460.62 × 7,181.76
  4. Step 4: Simplify right side
    11,215.38x = 111,034,462.29
  5. Step 5: Solve for x
    x = 111,034,462.29/11,215.38
  6. Step 6: Final answer
    x = 9,900.20

Related Problems

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Half scale
Find fourth proportional to 22,430.76, 30,921.24 and 14,363.52
Double scale
Find fourth proportional to 11,216.38, 15,462 and 7,182.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.