Home / 20,451.72-28,228.50-12,498.60

Finding the Fourth Proportional to 20,451.72, 28,228.50 and 12,498.60

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Solution

The fourth proportional to 20,451.72, 28,228.50 and 12,498.60 is: 17,251.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.72 : 28,228.50 = 12,498.60 : x
  2. Step 2: Convert to fraction form
    20,451.72/28,228.50 = 12,498.60/x
  3. Step 3: Cross multiply
    20,451.72x = 28,228.50 × 12,498.60
  4. Step 4: Simplify right side
    20,451.72x = 352,816,730.10
  5. Step 5: Solve for x
    x = 352,816,730.10/20,451.72
  6. Step 6: Final answer
    x = 17,251.20

Related Problems

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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.