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Finding the Fourth Proportional to 38,442.80, 57,664.20 and 31,444.40

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Solution

The fourth proportional to 38,442.80, 57,664.20 and 31,444.40 is: 47,166.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,442.80 : 57,664.20 = 31,444.40 : x
  2. Step 2: Convert to fraction form
    38,442.80/57,664.20 = 31,444.40/x
  3. Step 3: Cross multiply
    38,442.80x = 57,664.20 × 31,444.40
  4. Step 4: Simplify right side
    38,442.80x = 1,813,216,170.48
  5. Step 5: Solve for x
    x = 1,813,216,170.48/38,442.80
  6. Step 6: Final answer
    x = 47,166.60

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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.