Home / 20,540.90-28,363.73-13,000.53

Finding the Fourth Proportional to 20,540.90, 28,363.73 and 13,000.53

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Solution

The fourth proportional to 20,540.90, 28,363.73 and 13,000.53 is: 17,951.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.90 : 28,363.73 = 13,000.53 : x
  2. Step 2: Convert to fraction form
    20,540.90/28,363.73 = 13,000.53/x
  3. Step 3: Cross multiply
    20,540.90x = 28,363.73 × 13,000.53
  4. Step 4: Simplify right side
    20,540.90x = 368,743,564.14
  5. Step 5: Solve for x
    x = 368,743,564.14/20,540.90
  6. Step 6: Final answer
    x = 17,951.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.