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Finding the Fourth Proportional to 9,681, 13,359.69 and 5,489.25

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Solution

The fourth proportional to 9,681, 13,359.69 and 5,489.25 is: 7,575.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,681 : 13,359.69 = 5,489.25 : x
  2. Step 2: Convert to fraction form
    9,681/13,359.69 = 5,489.25/x
  3. Step 3: Cross multiply
    9,681x = 13,359.69 × 5,489.25
  4. Step 4: Simplify right side
    9,681x = 73,334,678.33
  5. Step 5: Solve for x
    x = 73,334,678.33/9,681
  6. Step 6: Final answer
    x = 7,575.11

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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.