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Finding the Fourth Proportional to 38,473.40, 57,758.70 and 20,718.20

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Solution

The fourth proportional to 38,473.40, 57,758.70 and 20,718.20 is: 31,103.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,473.40 : 57,758.70 = 20,718.20 : x
  2. Step 2: Convert to fraction form
    38,473.40/57,758.70 = 20,718.20/x
  3. Step 3: Cross multiply
    38,473.40x = 57,758.70 × 20,718.20
  4. Step 4: Simplify right side
    38,473.40x = 1,196,656,298.34
  5. Step 5: Solve for x
    x = 1,196,656,298.34/38,473.40
  6. Step 6: Final answer
    x = 31,103.47

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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.