Home / 13,489.12-18,613.92-7,520.32

Finding the Fourth Proportional to 13,489.12, 18,613.92 and 7,520.32

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Solution

The fourth proportional to 13,489.12, 18,613.92 and 7,520.32 is: 10,377.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.12 : 18,613.92 = 7,520.32 : x
  2. Step 2: Convert to fraction form
    13,489.12/18,613.92 = 7,520.32/x
  3. Step 3: Cross multiply
    13,489.12x = 18,613.92 × 7,520.32
  4. Step 4: Simplify right side
    13,489.12x = 139,982,634.85
  5. Step 5: Solve for x
    x = 139,982,634.85/13,489.12
  6. Step 6: Final answer
    x = 10,377.45

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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.