Home / 20,338.50-28,047.42-15,860.62

Finding the Fourth Proportional to 20,338.50, 28,047.42 and 15,860.62

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Solution

The fourth proportional to 20,338.50, 28,047.42 and 15,860.62 is: 21,872.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,338.50 : 28,047.42 = 15,860.62 : x
  2. Step 2: Convert to fraction form
    20,338.50/28,047.42 = 15,860.62/x
  3. Step 3: Cross multiply
    20,338.50x = 28,047.42 × 15,860.62
  4. Step 4: Simplify right side
    20,338.50x = 444,849,470.60
  5. Step 5: Solve for x
    x = 444,849,470.60/20,338.50
  6. Step 6: Final answer
    x = 21,872.29

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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.