Home / 28,142.80-42,221.88-9,425.92

Finding the Fourth Proportional to 28,142.80, 42,221.88 and 9,425.92

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Solution

The fourth proportional to 28,142.80, 42,221.88 and 9,425.92 is: 14,141.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,142.80 : 42,221.88 = 9,425.92 : x
  2. Step 2: Convert to fraction form
    28,142.80/42,221.88 = 9,425.92/x
  3. Step 3: Cross multiply
    28,142.80x = 42,221.88 × 9,425.92
  4. Step 4: Simplify right side
    28,142.80x = 397,980,063.13
  5. Step 5: Solve for x
    x = 397,980,063.13/28,142.80
  6. Step 6: Final answer
    x = 14,141.45

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1.5x scale

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.