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Finding the Fourth Proportional to 29,281.28, 40,425.60 and 18,118.40

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Solution

The fourth proportional to 29,281.28, 40,425.60 and 18,118.40 is: 25,014.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,281.28 : 40,425.60 = 18,118.40 : x
  2. Step 2: Convert to fraction form
    29,281.28/40,425.60 = 18,118.40/x
  3. Step 3: Cross multiply
    29,281.28x = 40,425.60 × 18,118.40
  4. Step 4: Simplify right side
    29,281.28x = 732,447,191.04
  5. Step 5: Solve for x
    x = 732,447,191.04/29,281.28
  6. Step 6: Final answer
    x = 25,014.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.