Home / 20,753.95-28,640.31-11,801.45

Finding the Fourth Proportional to 20,753.95, 28,640.31 and 11,801.45

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Solution

The fourth proportional to 20,753.95, 28,640.31 and 11,801.45 is: 16,285.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.95 : 28,640.31 = 11,801.45 : x
  2. Step 2: Convert to fraction form
    20,753.95/28,640.31 = 11,801.45/x
  3. Step 3: Cross multiply
    20,753.95x = 28,640.31 × 11,801.45
  4. Step 4: Simplify right side
    20,753.95x = 337,997,186.45
  5. Step 5: Solve for x
    x = 337,997,186.45/20,753.95
  6. Step 6: Final answer
    x = 16,285.92

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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.