Home / 20,908.23-28,856.49-13,359.57

Finding the Fourth Proportional to 20,908.23, 28,856.49 and 13,359.57

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Solution

The fourth proportional to 20,908.23, 28,856.49 and 13,359.57 is: 18,438.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.23 : 28,856.49 = 13,359.57 : x
  2. Step 2: Convert to fraction form
    20,908.23/28,856.49 = 13,359.57/x
  3. Step 3: Cross multiply
    20,908.23x = 28,856.49 × 13,359.57
  4. Step 4: Simplify right side
    20,908.23x = 385,510,139.80
  5. Step 5: Solve for x
    x = 385,510,139.80/20,908.23
  6. Step 6: Final answer
    x = 18,438.20

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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.