Home / 20,329.20-28,057.95-13,255.47

Finding the Fourth Proportional to 20,329.20, 28,057.95 and 13,255.47

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Solution

The fourth proportional to 20,329.20, 28,057.95 and 13,255.47 is: 18,294.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,329.20 : 28,057.95 = 13,255.47 : x
  2. Step 2: Convert to fraction form
    20,329.20/28,057.95 = 13,255.47/x
  3. Step 3: Cross multiply
    20,329.20x = 28,057.95 × 13,255.47
  4. Step 4: Simplify right side
    20,329.20x = 371,921,314.49
  5. Step 5: Solve for x
    x = 371,921,314.49/20,329.20
  6. Step 6: Final answer
    x = 18,294.93

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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.