Home / 20,569.20-28,385.60-11,137.80

Finding the Fourth Proportional to 20,569.20, 28,385.60 and 11,137.80

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Solution

The fourth proportional to 20,569.20, 28,385.60 and 11,137.80 is: 15,370.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.20 : 28,385.60 = 11,137.80 : x
  2. Step 2: Convert to fraction form
    20,569.20/28,385.60 = 11,137.80/x
  3. Step 3: Cross multiply
    20,569.20x = 28,385.60 × 11,137.80
  4. Step 4: Simplify right side
    20,569.20x = 316,153,135.68
  5. Step 5: Solve for x
    x = 316,153,135.68/20,569.20
  6. Step 6: Final answer
    x = 15,370.22

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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.