Home / 13,129.32-18,124.20-9,148.92

Finding the Fourth Proportional to 13,129.32, 18,124.20 and 9,148.92

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Solution

The fourth proportional to 13,129.32, 18,124.20 and 9,148.92 is: 12,629.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.32 : 18,124.20 = 9,148.92 : x
  2. Step 2: Convert to fraction form
    13,129.32/18,124.20 = 9,148.92/x
  3. Step 3: Cross multiply
    13,129.32x = 18,124.20 × 9,148.92
  4. Step 4: Simplify right side
    13,129.32x = 165,816,855.86
  5. Step 5: Solve for x
    x = 165,816,855.86/13,129.32
  6. Step 6: Final answer
    x = 12,629.51

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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.