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Finding the Fourth Proportional to 28,109.92, 42,164.88 and 7,333.24

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Solution

The fourth proportional to 28,109.92, 42,164.88 and 7,333.24 is: 10,999.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.92 : 42,164.88 = 7,333.24 : x
  2. Step 2: Convert to fraction form
    28,109.92/42,164.88 = 7,333.24/x
  3. Step 3: Cross multiply
    28,109.92x = 42,164.88 × 7,333.24
  4. Step 4: Simplify right side
    28,109.92x = 309,205,184.61
  5. Step 5: Solve for x
    x = 309,205,184.61/28,109.92
  6. Step 6: Final answer
    x = 10,999.86

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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.