Home / 20,913.10-31,369.22-8,432.86

Finding the Fourth Proportional to 20,913.10, 31,369.22 and 8,432.86

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Solution

The fourth proportional to 20,913.10, 31,369.22 and 8,432.86 is: 12,649.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.10 : 31,369.22 = 8,432.86 : x
  2. Step 2: Convert to fraction form
    20,913.10/31,369.22 = 8,432.86/x
  3. Step 3: Cross multiply
    20,913.10x = 31,369.22 × 8,432.86
  4. Step 4: Simplify right side
    20,913.10x = 264,532,240.57
  5. Step 5: Solve for x
    x = 264,532,240.57/20,913.10
  6. Step 6: Final answer
    x = 12,649.12

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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.