Home / 20,124.10-30,186.15-13,125.70

Finding the Fourth Proportional to 20,124.10, 30,186.15 and 13,125.70

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Solution

The fourth proportional to 20,124.10, 30,186.15 and 13,125.70 is: 19,688.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,124.10 : 30,186.15 = 13,125.70 : x
  2. Step 2: Convert to fraction form
    20,124.10/30,186.15 = 13,125.70/x
  3. Step 3: Cross multiply
    20,124.10x = 30,186.15 × 13,125.70
  4. Step 4: Simplify right side
    20,124.10x = 396,214,349.06
  5. Step 5: Solve for x
    x = 396,214,349.06/20,124.10
  6. Step 6: Final answer
    x = 19,688.55

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Similar ratio
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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.