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Finding the Fourth Proportional to 28,117.92, 42,176.88 and 7,341.24

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Solution

The fourth proportional to 28,117.92, 42,176.88 and 7,341.24 is: 11,011.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,117.92 : 42,176.88 = 7,341.24 : x
  2. Step 2: Convert to fraction form
    28,117.92/42,176.88 = 7,341.24/x
  3. Step 3: Cross multiply
    28,117.92x = 42,176.88 × 7,341.24
  4. Step 4: Simplify right side
    28,117.92x = 309,630,598.53
  5. Step 5: Solve for x
    x = 309,630,598.53/28,117.92
  6. Step 6: Final answer
    x = 11,011.86

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.