Home / 28,502.80-42,758.88-8,781.36

Finding the Fourth Proportional to 28,502.80, 42,758.88 and 8,781.36

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Solution

The fourth proportional to 28,502.80, 42,758.88 and 8,781.36 is: 13,173.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,502.80 : 42,758.88 = 8,781.36 : x
  2. Step 2: Convert to fraction form
    28,502.80/42,758.88 = 8,781.36/x
  3. Step 3: Cross multiply
    28,502.80x = 42,758.88 × 8,781.36
  4. Step 4: Simplify right side
    28,502.80x = 375,481,118.48
  5. Step 5: Solve for x
    x = 375,481,118.48/28,502.80
  6. Step 6: Final answer
    x = 13,173.48

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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.