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Finding the Fourth Proportional to 9,241.60, 12,734.40 and 7,139.20

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Solution

The fourth proportional to 9,241.60, 12,734.40 and 7,139.20 is: 9,837.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,241.60 : 12,734.40 = 7,139.20 : x
  2. Step 2: Convert to fraction form
    9,241.60/12,734.40 = 7,139.20/x
  3. Step 3: Cross multiply
    9,241.60x = 12,734.40 × 7,139.20
  4. Step 4: Simplify right side
    9,241.60x = 90,913,428.48
  5. Step 5: Solve for x
    x = 90,913,428.48/9,241.60
  6. Step 6: Final answer
    x = 9,837.41

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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.