Home / 20,962.06-31,430.91-8,471.86

Finding the Fourth Proportional to 20,962.06, 31,430.91 and 8,471.86

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Solution

The fourth proportional to 20,962.06, 31,430.91 and 8,471.86 is: 12,702.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.06 : 31,430.91 = 8,471.86 : x
  2. Step 2: Convert to fraction form
    20,962.06/31,430.91 = 8,471.86/x
  3. Step 3: Cross multiply
    20,962.06x = 31,430.91 × 8,471.86
  4. Step 4: Simplify right side
    20,962.06x = 266,278,269.19
  5. Step 5: Solve for x
    x = 266,278,269.19/20,962.06
  6. Step 6: Final answer
    x = 12,702.87

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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.