Home / 39,140.60-54,014.15-21,235.76

Finding the Fourth Proportional to 39,140.60, 54,014.15 and 21,235.76

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Solution

The fourth proportional to 39,140.60, 54,014.15 and 21,235.76 is: 29,305.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,140.60 : 54,014.15 = 21,235.76 : x
  2. Step 2: Convert to fraction form
    39,140.60/54,014.15 = 21,235.76/x
  3. Step 3: Cross multiply
    39,140.60x = 54,014.15 × 21,235.76
  4. Step 4: Simplify right side
    39,140.60x = 1,147,031,149.75
  5. Step 5: Solve for x
    x = 1,147,031,149.75/39,140.60
  6. Step 6: Final answer
    x = 29,305.40

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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.