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Finding the Fourth Proportional to 15,115.36, 20,854.92 and 9,526.36

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Solution

The fourth proportional to 15,115.36, 20,854.92 and 9,526.36 is: 13,143.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.36 : 20,854.92 = 9,526.36 : x
  2. Step 2: Convert to fraction form
    15,115.36/20,854.92 = 9,526.36/x
  3. Step 3: Cross multiply
    15,115.36x = 20,854.92 × 9,526.36
  4. Step 4: Simplify right side
    15,115.36x = 198,671,475.69
  5. Step 5: Solve for x
    x = 198,671,475.69/15,115.36
  6. Step 6: Final answer
    x = 13,143.68

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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.