Home / 39,720.76-54,816.17-21,816.52

Finding the Fourth Proportional to 39,720.76, 54,816.17 and 21,816.52

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Solution

The fourth proportional to 39,720.76, 54,816.17 and 21,816.52 is: 30,107.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,720.76 : 54,816.17 = 21,816.52 : x
  2. Step 2: Convert to fraction form
    39,720.76/54,816.17 = 21,816.52/x
  3. Step 3: Cross multiply
    39,720.76x = 54,816.17 × 21,816.52
  4. Step 4: Simplify right side
    39,720.76x = 1,195,897,823.01
  5. Step 5: Solve for x
    x = 1,195,897,823.01/39,720.76
  6. Step 6: Final answer
    x = 30,107.63

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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.