Home / 28,578.80-42,778.46-19,641.88

Finding the Fourth Proportional to 28,578.80, 42,778.46 and 19,641.88

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Solution

The fourth proportional to 28,578.80, 42,778.46 and 19,641.88 is: 29,401.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.80 : 42,778.46 = 19,641.88 : x
  2. Step 2: Convert to fraction form
    28,578.80/42,778.46 = 19,641.88/x
  3. Step 3: Cross multiply
    28,578.80x = 42,778.46 × 19,641.88
  4. Step 4: Simplify right side
    28,578.80x = 840,249,377.90
  5. Step 5: Solve for x
    x = 840,249,377.90/28,578.80
  6. Step 6: Final answer
    x = 29,401.14

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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.