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Finding the Fourth Proportional to 6,616.80, 9,918.87 and 2,455.70

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Solution

The fourth proportional to 6,616.80, 9,918.87 and 2,455.70 is: 3,681.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,616.80 : 9,918.87 = 2,455.70 : x
  2. Step 2: Convert to fraction form
    6,616.80/9,918.87 = 2,455.70/x
  3. Step 3: Cross multiply
    6,616.80x = 9,918.87 × 2,455.70
  4. Step 4: Simplify right side
    6,616.80x = 24,357,769.06
  5. Step 5: Solve for x
    x = 24,357,769.06/6,616.80
  6. Step 6: Final answer
    x = 3,681.20

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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.