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Finding the Fourth Proportional to 28,070.28, 42,105.42 and 8,349.12

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Solution

The fourth proportional to 28,070.28, 42,105.42 and 8,349.12 is: 12,523.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,070.28 : 42,105.42 = 8,349.12 : x
  2. Step 2: Convert to fraction form
    28,070.28/42,105.42 = 8,349.12/x
  3. Step 3: Cross multiply
    28,070.28x = 42,105.42 × 8,349.12
  4. Step 4: Simplify right side
    28,070.28x = 351,543,204.23
  5. Step 5: Solve for x
    x = 351,543,204.23/28,070.28
  6. Step 6: Final answer
    x = 12,523.68

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