Home / 20,753.12-28,640.04-11,800.40

Finding the Fourth Proportional to 20,753.12, 28,640.04 and 11,800.40

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Solution

The fourth proportional to 20,753.12, 28,640.04 and 11,800.40 is: 16,284.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.12 : 28,640.04 = 11,800.40 : x
  2. Step 2: Convert to fraction form
    20,753.12/28,640.04 = 11,800.40/x
  3. Step 3: Cross multiply
    20,753.12x = 28,640.04 × 11,800.40
  4. Step 4: Simplify right side
    20,753.12x = 337,963,928.02
  5. Step 5: Solve for x
    x = 337,963,928.02/20,753.12
  6. Step 6: Final answer
    x = 16,284.97

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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.