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Finding the Fourth Proportional to 28,115.56, 42,173.34 and 7,339.08

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Solution

The fourth proportional to 28,115.56, 42,173.34 and 7,339.08 is: 11,008.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.56 : 42,173.34 = 7,339.08 : x
  2. Step 2: Convert to fraction form
    28,115.56/42,173.34 = 7,339.08/x
  3. Step 3: Cross multiply
    28,115.56x = 42,173.34 × 7,339.08
  4. Step 4: Simplify right side
    28,115.56x = 309,513,516.13
  5. Step 5: Solve for x
    x = 309,513,516.13/28,115.56
  6. Step 6: Final answer
    x = 11,008.62

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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.