Home / 13,545.76-20,312.88-4,781.92

Finding the Fourth Proportional to 13,545.76, 20,312.88 and 4,781.92

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Solution

The fourth proportional to 13,545.76, 20,312.88 and 4,781.92 is: 7,170.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,545.76 : 20,312.88 = 4,781.92 : x
  2. Step 2: Convert to fraction form
    13,545.76/20,312.88 = 4,781.92/x
  3. Step 3: Cross multiply
    13,545.76x = 20,312.88 × 4,781.92
  4. Step 4: Simplify right side
    13,545.76x = 97,134,567.13
  5. Step 5: Solve for x
    x = 97,134,567.13/13,545.76
  6. Step 6: Final answer
    x = 7,170.85

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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.