Home / 20,660.10-28,508.61-11,705.70

Finding the Fourth Proportional to 20,660.10, 28,508.61 and 11,705.70

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Solution

The fourth proportional to 20,660.10, 28,508.61 and 11,705.70 is: 16,152.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.10 : 28,508.61 = 11,705.70 : x
  2. Step 2: Convert to fraction form
    20,660.10/28,508.61 = 11,705.70/x
  3. Step 3: Cross multiply
    20,660.10x = 28,508.61 × 11,705.70
  4. Step 4: Simplify right side
    20,660.10x = 333,713,236.08
  5. Step 5: Solve for x
    x = 333,713,236.08/20,660.10
  6. Step 6: Final answer
    x = 16,152.55

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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.