Home / 20,708.10-31,079.87-8,236.91

Finding the Fourth Proportional to 20,708.10, 31,079.87 and 8,236.91

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Solution

The fourth proportional to 20,708.10, 31,079.87 and 8,236.91 is: 12,362.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.10 : 31,079.87 = 8,236.91 : x
  2. Step 2: Convert to fraction form
    20,708.10/31,079.87 = 8,236.91/x
  3. Step 3: Cross multiply
    20,708.10x = 31,079.87 × 8,236.91
  4. Step 4: Simplify right side
    20,708.10x = 256,001,895.42
  5. Step 5: Solve for x
    x = 256,001,895.42/20,708.10
  6. Step 6: Final answer
    x = 12,362.40

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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.