Home / 20,423.45-28,189.20-12,472.35

Finding the Fourth Proportional to 20,423.45, 28,189.20 and 12,472.35

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Solution

The fourth proportional to 20,423.45, 28,189.20 and 12,472.35 is: 17,214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.45 : 28,189.20 = 12,472.35 : x
  2. Step 2: Convert to fraction form
    20,423.45/28,189.20 = 12,472.35/x
  3. Step 3: Cross multiply
    20,423.45x = 28,189.20 × 12,472.35
  4. Step 4: Simplify right side
    20,423.45x = 351,585,568.62
  5. Step 5: Solve for x
    x = 351,585,568.62/20,423.45
  6. Step 6: Final answer
    x = 17,214.80

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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.