Home / 20,830.50-28,711.13-15,793.11

Finding the Fourth Proportional to 20,830.50, 28,711.13 and 15,793.11

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Solution

The fourth proportional to 20,830.50, 28,711.13 and 15,793.11 is: 21,767.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.50 : 28,711.13 = 15,793.11 : x
  2. Step 2: Convert to fraction form
    20,830.50/28,711.13 = 15,793.11/x
  3. Step 3: Cross multiply
    20,830.50x = 28,711.13 × 15,793.11
  4. Step 4: Simplify right side
    20,830.50x = 453,437,955.35
  5. Step 5: Solve for x
    x = 453,437,955.35/20,830.50
  6. Step 6: Final answer
    x = 21,767.98

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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.