Home / 8,638.85-11,923.40-5,617.76

Finding the Fourth Proportional to 8,638.85, 11,923.40 and 5,617.76

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Solution

The fourth proportional to 8,638.85, 11,923.40 and 5,617.76 is: 7,753.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.85 : 11,923.40 = 5,617.76 : x
  2. Step 2: Convert to fraction form
    8,638.85/11,923.40 = 5,617.76/x
  3. Step 3: Cross multiply
    8,638.85x = 11,923.40 × 5,617.76
  4. Step 4: Simplify right side
    8,638.85x = 66,982,754.01
  5. Step 5: Solve for x
    x = 66,982,754.01/8,638.85
  6. Step 6: Final answer
    x = 7,753.66

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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.