Home / 20,373.20-28,116.18-15,328.38

Finding the Fourth Proportional to 20,373.20, 28,116.18 and 15,328.38

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Solution

The fourth proportional to 20,373.20, 28,116.18 and 15,328.38 is: 21,154.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.20 : 28,116.18 = 15,328.38 : x
  2. Step 2: Convert to fraction form
    20,373.20/28,116.18 = 15,328.38/x
  3. Step 3: Cross multiply
    20,373.20x = 28,116.18 × 15,328.38
  4. Step 4: Simplify right side
    20,373.20x = 430,975,491.19
  5. Step 5: Solve for x
    x = 430,975,491.19/20,373.20
  6. Step 6: Final answer
    x = 21,154.04

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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.