Home / 20,780.15-28,657.13-16,545.18

Finding the Fourth Proportional to 20,780.15, 28,657.13 and 16,545.18

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Solution

The fourth proportional to 20,780.15, 28,657.13 and 16,545.18 is: 22,816.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.15 : 28,657.13 = 16,545.18 : x
  2. Step 2: Convert to fraction form
    20,780.15/28,657.13 = 16,545.18/x
  3. Step 3: Cross multiply
    20,780.15x = 28,657.13 × 16,545.18
  4. Step 4: Simplify right side
    20,780.15x = 474,137,291.41
  5. Step 5: Solve for x
    x = 474,137,291.41/20,780.15
  6. Step 6: Final answer
    x = 22,816.84

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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.