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Finding the Fourth Proportional to 15,115.61, 20,862.12 and 9,736.52

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Solution

The fourth proportional to 15,115.61, 20,862.12 and 9,736.52 is: 13,438.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.61 : 20,862.12 = 9,736.52 : x
  2. Step 2: Convert to fraction form
    15,115.61/20,862.12 = 9,736.52/x
  3. Step 3: Cross multiply
    15,115.61x = 20,862.12 × 9,736.52
  4. Step 4: Simplify right side
    15,115.61x = 203,124,448.62
  5. Step 5: Solve for x
    x = 203,124,448.62/15,115.61
  6. Step 6: Final answer
    x = 13,438.06

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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.