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Finding the Fourth Proportional to 38,465.80, 57,714.90 and 20,948.20

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Solution

The fourth proportional to 38,465.80, 57,714.90 and 20,948.20 is: 31,431.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,465.80 : 57,714.90 = 20,948.20 : x
  2. Step 2: Convert to fraction form
    38,465.80/57,714.90 = 20,948.20/x
  3. Step 3: Cross multiply
    38,465.80x = 57,714.90 × 20,948.20
  4. Step 4: Simplify right side
    38,465.80x = 1,209,023,268.18
  5. Step 5: Solve for x
    x = 1,209,023,268.18/38,465.80
  6. Step 6: Final answer
    x = 31,431.12

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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.