Home / 28,359.90-42,545.91-8,640.03

Finding the Fourth Proportional to 28,359.90, 42,545.91 and 8,640.03

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Solution

The fourth proportional to 28,359.90, 42,545.91 and 8,640.03 is: 12,961.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.90 : 42,545.91 = 8,640.03 : x
  2. Step 2: Convert to fraction form
    28,359.90/42,545.91 = 8,640.03/x
  3. Step 3: Cross multiply
    28,359.90x = 42,545.91 × 8,640.03
  4. Step 4: Simplify right side
    28,359.90x = 367,597,938.78
  5. Step 5: Solve for x
    x = 367,597,938.78/28,359.90
  6. Step 6: Final answer
    x = 12,961.89

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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.