Home / 20,803.72-28,711.12-11,373.70

Finding the Fourth Proportional to 20,803.72, 28,711.12 and 11,373.70

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Solution

The fourth proportional to 20,803.72, 28,711.12 and 11,373.70 is: 15,696.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.72 : 28,711.12 = 11,373.70 : x
  2. Step 2: Convert to fraction form
    20,803.72/28,711.12 = 11,373.70/x
  3. Step 3: Cross multiply
    20,803.72x = 28,711.12 × 11,373.70
  4. Step 4: Simplify right side
    20,803.72x = 326,551,665.54
  5. Step 5: Solve for x
    x = 326,551,665.54/20,803.72
  6. Step 6: Final answer
    x = 15,696.79

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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.