Home / 20,552.50-28,355.85-12,590.74

Finding the Fourth Proportional to 20,552.50, 28,355.85 and 12,590.74

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Solution

The fourth proportional to 20,552.50, 28,355.85 and 12,590.74 is: 17,371.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,552.50 : 28,355.85 = 12,590.74 : x
  2. Step 2: Convert to fraction form
    20,552.50/28,355.85 = 12,590.74/x
  3. Step 3: Cross multiply
    20,552.50x = 28,355.85 × 12,590.74
  4. Step 4: Simplify right side
    20,552.50x = 357,021,134.83
  5. Step 5: Solve for x
    x = 357,021,134.83/20,552.50
  6. Step 6: Final answer
    x = 17,371.18

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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.