Home / 9,121.55-13,686.44-5,616.90

Finding the Fourth Proportional to 9,121.55, 13,686.44 and 5,616.90

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Solution

The fourth proportional to 9,121.55, 13,686.44 and 5,616.90 is: 8,427.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.55 : 13,686.44 = 5,616.90 : x
  2. Step 2: Convert to fraction form
    9,121.55/13,686.44 = 5,616.90/x
  3. Step 3: Cross multiply
    9,121.55x = 13,686.44 × 5,616.90
  4. Step 4: Simplify right side
    9,121.55x = 76,875,336.75
  5. Step 5: Solve for x
    x = 76,875,336.75/9,121.55
  6. Step 6: Final answer
    x = 8,427.89

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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.