Home / 13,613.80-20,439.90-10,695.40

Finding the Fourth Proportional to 13,613.80, 20,439.90 and 10,695.40

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Solution

The fourth proportional to 13,613.80, 20,439.90 and 10,695.40 is: 16,058.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.80 : 20,439.90 = 10,695.40 : x
  2. Step 2: Convert to fraction form
    13,613.80/20,439.90 = 10,695.40/x
  3. Step 3: Cross multiply
    13,613.80x = 20,439.90 × 10,695.40
  4. Step 4: Simplify right side
    13,613.80x = 218,612,906.46
  5. Step 5: Solve for x
    x = 218,612,906.46/13,613.80
  6. Step 6: Final answer
    x = 16,058.18

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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.