Home / 15,422.76-21,285.58-8,711.08

Finding the Fourth Proportional to 15,422.76, 21,285.58 and 8,711.08

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Solution

The fourth proportional to 15,422.76, 21,285.58 and 8,711.08 is: 12,022.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,422.76 : 21,285.58 = 8,711.08 : x
  2. Step 2: Convert to fraction form
    15,422.76/21,285.58 = 8,711.08/x
  3. Step 3: Cross multiply
    15,422.76x = 21,285.58 × 8,711.08
  4. Step 4: Simplify right side
    15,422.76x = 185,420,390.23
  5. Step 5: Solve for x
    x = 185,420,390.23/15,422.76
  6. Step 6: Final answer
    x = 12,022.52

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Half scale
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Double scale
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Similar ratio
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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.