Home / 42,728.80-64,103.28-16,434.40

Finding the Fourth Proportional to 42,728.80, 64,103.28 and 16,434.40

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Solution

The fourth proportional to 42,728.80, 64,103.28 and 16,434.40 is: 24,655.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,728.80 : 64,103.28 = 16,434.40 : x
  2. Step 2: Convert to fraction form
    42,728.80/64,103.28 = 16,434.40/x
  3. Step 3: Cross multiply
    42,728.80x = 64,103.28 × 16,434.40
  4. Step 4: Simplify right side
    42,728.80x = 1,053,498,944.83
  5. Step 5: Solve for x
    x = 1,053,498,944.83/42,728.80
  6. Step 6: Final answer
    x = 24,655.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.