Home / 20,689.00-28,545.84-12,191.47

Finding the Fourth Proportional to 20,689.00, 28,545.84 and 12,191.47

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Solution

The fourth proportional to 20,689.00, 28,545.84 and 12,191.47 is: 16,821.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.00 : 28,545.84 = 12,191.47 : x
  2. Step 2: Convert to fraction form
    20,689.00/28,545.84 = 12,191.47/x
  3. Step 3: Cross multiply
    20,689.00x = 28,545.84 × 12,191.47
  4. Step 4: Simplify right side
    20,689.00x = 348,015,680.62
  5. Step 5: Solve for x
    x = 348,015,680.62/20,689.00
  6. Step 6: Final answer
    x = 16,821.29

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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.