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Finding the Fourth Proportional to 38,899.60, 58,300.80 and 28,499.20

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Solution

The fourth proportional to 38,899.60, 58,300.80 and 28,499.20 is: 42,713.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,899.60 : 58,300.80 = 28,499.20 : x
  2. Step 2: Convert to fraction form
    38,899.60/58,300.80 = 28,499.20/x
  3. Step 3: Cross multiply
    38,899.60x = 58,300.80 × 28,499.20
  4. Step 4: Simplify right side
    38,899.60x = 1,661,526,159.36
  5. Step 5: Solve for x
    x = 1,661,526,159.36/38,899.60
  6. Step 6: Final answer
    x = 42,713.19

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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.