Home / 15,215.54-20,997.48-8,501.42

Finding the Fourth Proportional to 15,215.54, 20,997.48 and 8,501.42

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Solution

The fourth proportional to 15,215.54, 20,997.48 and 8,501.42 is: 11,731.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.54 : 20,997.48 = 8,501.42 : x
  2. Step 2: Convert to fraction form
    15,215.54/20,997.48 = 8,501.42/x
  3. Step 3: Cross multiply
    15,215.54x = 20,997.48 × 8,501.42
  4. Step 4: Simplify right side
    15,215.54x = 178,508,291.43
  5. Step 5: Solve for x
    x = 178,508,291.43/15,215.54
  6. Step 6: Final answer
    x = 11,731.98

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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.