Home / 39,724.80-54,816.96-21,818.88

Finding the Fourth Proportional to 39,724.80, 54,816.96 and 21,818.88

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Solution

The fourth proportional to 39,724.80, 54,816.96 and 21,818.88 is: 30,108.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,724.80 : 54,816.96 = 21,818.88 : x
  2. Step 2: Convert to fraction form
    39,724.80/54,816.96 = 21,818.88/x
  3. Step 3: Cross multiply
    39,724.80x = 54,816.96 × 21,818.88
  4. Step 4: Simplify right side
    39,724.80x = 1,196,044,672.20
  5. Step 5: Solve for x
    x = 1,196,044,672.20/39,724.80
  6. Step 6: Final answer
    x = 30,108.26

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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.