Home / 39,587.28-54,630.52-21,438.20

Finding the Fourth Proportional to 39,587.28, 54,630.52 and 21,438.20

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Solution

The fourth proportional to 39,587.28, 54,630.52 and 21,438.20 is: 29,584.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,587.28 : 54,630.52 = 21,438.20 : x
  2. Step 2: Convert to fraction form
    39,587.28/54,630.52 = 21,438.20/x
  3. Step 3: Cross multiply
    39,587.28x = 54,630.52 × 21,438.20
  4. Step 4: Simplify right side
    39,587.28x = 1,171,180,013.86
  5. Step 5: Solve for x
    x = 1,171,180,013.86/39,587.28
  6. Step 6: Final answer
    x = 29,584.76

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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.