Home / 20,967.17-28,938.82-12,020.68

Finding the Fourth Proportional to 20,967.17, 28,938.82 and 12,020.68

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Solution

The fourth proportional to 20,967.17, 28,938.82 and 12,020.68 is: 16,590.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.17 : 28,938.82 = 12,020.68 : x
  2. Step 2: Convert to fraction form
    20,967.17/28,938.82 = 12,020.68/x
  3. Step 3: Cross multiply
    20,967.17x = 28,938.82 × 12,020.68
  4. Step 4: Simplify right side
    20,967.17x = 347,864,294.80
  5. Step 5: Solve for x
    x = 347,864,294.80/20,967.17
  6. Step 6: Final answer
    x = 16,590.90

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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.