Home / 39,423.60-54,405.75-21,519.78

Finding the Fourth Proportional to 39,423.60, 54,405.75 and 21,519.78

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Solution

The fourth proportional to 39,423.60, 54,405.75 and 21,519.78 is: 29,697.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,423.60 : 54,405.75 = 21,519.78 : x
  2. Step 2: Convert to fraction form
    39,423.60/54,405.75 = 21,519.78/x
  3. Step 3: Cross multiply
    39,423.60x = 54,405.75 × 21,519.78
  4. Step 4: Simplify right side
    39,423.60x = 1,170,799,770.74
  5. Step 5: Solve for x
    x = 1,170,799,770.74/39,423.60
  6. Step 6: Final answer
    x = 29,697.94

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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.