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Finding the Fourth Proportional to 27,999.60, 42,001.60 and 9,278.88

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Solution

The fourth proportional to 27,999.60, 42,001.60 and 9,278.88 is: 13,919.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,999.60 : 42,001.60 = 9,278.88 : x
  2. Step 2: Convert to fraction form
    27,999.60/42,001.60 = 9,278.88/x
  3. Step 3: Cross multiply
    27,999.60x = 42,001.60 × 9,278.88
  4. Step 4: Simplify right side
    27,999.60x = 389,727,806.21
  5. Step 5: Solve for x
    x = 389,727,806.21/27,999.60
  6. Step 6: Final answer
    x = 13,919.05

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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.