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Finding the Fourth Proportional to 11,565.80, 17,356.80 and 7,415.90

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Solution

The fourth proportional to 11,565.80, 17,356.80 and 7,415.90 is: 11,129.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,565.80 : 17,356.80 = 7,415.90 : x
  2. Step 2: Convert to fraction form
    11,565.80/17,356.80 = 7,415.90/x
  3. Step 3: Cross multiply
    11,565.80x = 17,356.80 × 7,415.90
  4. Step 4: Simplify right side
    11,565.80x = 128,716,293.12
  5. Step 5: Solve for x
    x = 128,716,293.12/11,565.80
  6. Step 6: Final answer
    x = 11,129.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.