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Finding the Fourth Proportional to 26,948.40, 40,422.60 and 15,138.60

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Solution

The fourth proportional to 26,948.40, 40,422.60 and 15,138.60 is: 22,707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,948.40 : 40,422.60 = 15,138.60 : x
  2. Step 2: Convert to fraction form
    26,948.40/40,422.60 = 15,138.60/x
  3. Step 3: Cross multiply
    26,948.40x = 40,422.60 × 15,138.60
  4. Step 4: Simplify right side
    26,948.40x = 611,941,572.36
  5. Step 5: Solve for x
    x = 611,941,572.36/26,948.40
  6. Step 6: Final answer
    x = 22,707.90

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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.