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Finding the Fourth Proportional to 9,895, 13,655.10 and 5,479

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Solution

The fourth proportional to 9,895, 13,655.10 and 5,479 is: 7,561.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,895 : 13,655.10 = 5,479 : x
  2. Step 2: Convert to fraction form
    9,895/13,655.10 = 5,479/x
  3. Step 3: Cross multiply
    9,895x = 13,655.10 × 5,479
  4. Step 4: Simplify right side
    9,895x = 74,816,292.90
  5. Step 5: Solve for x
    x = 74,816,292.90/9,895
  6. Step 6: Final answer
    x = 7,561.02

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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.