Home / 9,865.72-13,615.88-5,617.80

Finding the Fourth Proportional to 9,865.72, 13,615.88 and 5,617.80

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Solution

The fourth proportional to 9,865.72, 13,615.88 and 5,617.80 is: 7,753.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,865.72 : 13,615.88 = 5,617.80 : x
  2. Step 2: Convert to fraction form
    9,865.72/13,615.88 = 5,617.80/x
  3. Step 3: Cross multiply
    9,865.72x = 13,615.88 × 5,617.80
  4. Step 4: Simplify right side
    9,865.72x = 76,491,290.66
  5. Step 5: Solve for x
    x = 76,491,290.66/9,865.72
  6. Step 6: Final answer
    x = 7,753.24

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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.