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Finding the Fourth Proportional to 26,959.40, 40,439.10 and 20,731.40

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Solution

The fourth proportional to 26,959.40, 40,439.10 and 20,731.40 is: 31,097.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,959.40 : 40,439.10 = 20,731.40 : x
  2. Step 2: Convert to fraction form
    26,959.40/40,439.10 = 20,731.40/x
  3. Step 3: Cross multiply
    26,959.40x = 40,439.10 × 20,731.40
  4. Step 4: Simplify right side
    26,959.40x = 838,359,157.74
  5. Step 5: Solve for x
    x = 838,359,157.74/26,959.40
  6. Step 6: Final answer
    x = 31,097.10

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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.