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Finding the Fourth Proportional to 9,616.80, 13,266.32 and 8,858.40

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Solution

The fourth proportional to 9,616.80, 13,266.32 and 8,858.40 is: 12,220.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,616.80 : 13,266.32 = 8,858.40 : x
  2. Step 2: Convert to fraction form
    9,616.80/13,266.32 = 8,858.40/x
  3. Step 3: Cross multiply
    9,616.80x = 13,266.32 × 8,858.40
  4. Step 4: Simplify right side
    9,616.80x = 117,518,369.09
  5. Step 5: Solve for x
    x = 117,518,369.09/9,616.80
  6. Step 6: Final answer
    x = 12,220.11

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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.