Home / 39,765.76-54,876.86-21,862.60

Finding the Fourth Proportional to 39,765.76, 54,876.86 and 21,862.60

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Solution

The fourth proportional to 39,765.76, 54,876.86 and 21,862.60 is: 30,170.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,765.76 : 54,876.86 = 21,862.60 : x
  2. Step 2: Convert to fraction form
    39,765.76/54,876.86 = 21,862.60/x
  3. Step 3: Cross multiply
    39,765.76x = 54,876.86 × 21,862.60
  4. Step 4: Simplify right side
    39,765.76x = 1,199,750,839.44
  5. Step 5: Solve for x
    x = 1,199,750,839.44/39,765.76
  6. Step 6: Final answer
    x = 30,170.45

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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.