Home / 15,215.90-20,996.94-8,501.20

Finding the Fourth Proportional to 15,215.90, 20,996.94 and 8,501.20

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Solution

The fourth proportional to 15,215.90, 20,996.94 and 8,501.20 is: 11,731.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.90 : 20,996.94 = 8,501.20 : x
  2. Step 2: Convert to fraction form
    15,215.90/20,996.94 = 8,501.20/x
  3. Step 3: Cross multiply
    15,215.90x = 20,996.94 × 8,501.20
  4. Step 4: Simplify right side
    15,215.90x = 178,499,186.33
  5. Step 5: Solve for x
    x = 178,499,186.33/15,215.90
  6. Step 6: Final answer
    x = 11,731.10

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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.