Home / 13,489.12-18,613.32-7,520.40

Finding the Fourth Proportional to 13,489.12, 18,613.32 and 7,520.40

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Solution

The fourth proportional to 13,489.12, 18,613.32 and 7,520.40 is: 10,377.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.12 : 18,613.32 = 7,520.40 : x
  2. Step 2: Convert to fraction form
    13,489.12/18,613.32 = 7,520.40/x
  3. Step 3: Cross multiply
    13,489.12x = 18,613.32 × 7,520.40
  4. Step 4: Simplify right side
    13,489.12x = 139,979,611.73
  5. Step 5: Solve for x
    x = 139,979,611.73/13,489.12
  6. Step 6: Final answer
    x = 10,377.22

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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.