Home / 20,938.76-28,882.51-13,769.49

Finding the Fourth Proportional to 20,938.76, 28,882.51 and 13,769.49

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Solution

The fourth proportional to 20,938.76, 28,882.51 and 13,769.49 is: 18,993.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.76 : 28,882.51 = 13,769.49 : x
  2. Step 2: Convert to fraction form
    20,938.76/28,882.51 = 13,769.49/x
  3. Step 3: Cross multiply
    20,938.76x = 28,882.51 × 13,769.49
  4. Step 4: Simplify right side
    20,938.76x = 397,697,432.62
  5. Step 5: Solve for x
    x = 397,697,432.62/20,938.76
  6. Step 6: Final answer
    x = 18,993.36

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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.