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Finding the Fourth Proportional to 26,985.80, 40,478.70 and 25,344.20

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Solution

The fourth proportional to 26,985.80, 40,478.70 and 25,344.20 is: 38,016.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,985.80 : 40,478.70 = 25,344.20 : x
  2. Step 2: Convert to fraction form
    26,985.80/40,478.70 = 25,344.20/x
  3. Step 3: Cross multiply
    26,985.80x = 40,478.70 × 25,344.20
  4. Step 4: Simplify right side
    26,985.80x = 1,025,900,268.54
  5. Step 5: Solve for x
    x = 1,025,900,268.54/26,985.80
  6. Step 6: Final answer
    x = 38,016.30

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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.