Home / 20,753.70-28,640.40-11,801.18

Finding the Fourth Proportional to 20,753.70, 28,640.40 and 11,801.18

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Solution

The fourth proportional to 20,753.70, 28,640.40 and 11,801.18 is: 16,285.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.70 : 28,640.40 = 11,801.18 : x
  2. Step 2: Convert to fraction form
    20,753.70/28,640.40 = 11,801.18/x
  3. Step 3: Cross multiply
    20,753.70x = 28,640.40 × 11,801.18
  4. Step 4: Simplify right side
    20,753.70x = 337,990,515.67
  5. Step 5: Solve for x
    x = 337,990,515.67/20,753.70
  6. Step 6: Final answer
    x = 16,285.80

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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.