Home / 9,107.86-12,569.08-5,129.12

Finding the Fourth Proportional to 9,107.86, 12,569.08 and 5,129.12

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Solution

The fourth proportional to 9,107.86, 12,569.08 and 5,129.12 is: 7,078.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,107.86 : 12,569.08 = 5,129.12 : x
  2. Step 2: Convert to fraction form
    9,107.86/12,569.08 = 5,129.12/x
  3. Step 3: Cross multiply
    9,107.86x = 12,569.08 × 5,129.12
  4. Step 4: Simplify right side
    9,107.86x = 64,468,319.61
  5. Step 5: Solve for x
    x = 64,468,319.61/9,107.86
  6. Step 6: Final answer
    x = 7,078.32

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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.