Home / 15,854.50-21,879.23-8,780.92

Finding the Fourth Proportional to 15,854.50, 21,879.23 and 8,780.92

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Solution

The fourth proportional to 15,854.50, 21,879.23 and 8,780.92 is: 12,117.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,854.50 : 21,879.23 = 8,780.92 : x
  2. Step 2: Convert to fraction form
    15,854.50/21,879.23 = 8,780.92/x
  3. Step 3: Cross multiply
    15,854.50x = 21,879.23 × 8,780.92
  4. Step 4: Simplify right side
    15,854.50x = 192,119,712.80
  5. Step 5: Solve for x
    x = 192,119,712.80/15,854.50
  6. Step 6: Final answer
    x = 12,117.68

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Half scale
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Double scale
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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.