Home / 20,275.85-30,391.19-8,423.02

Finding the Fourth Proportional to 20,275.85, 30,391.19 and 8,423.02

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Solution

The fourth proportional to 20,275.85, 30,391.19 and 8,423.02 is: 12,625.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,275.85 : 30,391.19 = 8,423.02 : x
  2. Step 2: Convert to fraction form
    20,275.85/30,391.19 = 8,423.02/x
  3. Step 3: Cross multiply
    20,275.85x = 30,391.19 × 8,423.02
  4. Step 4: Simplify right side
    20,275.85x = 255,985,514.69
  5. Step 5: Solve for x
    x = 255,985,514.69/20,275.85
  6. Step 6: Final answer
    x = 12,625.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.