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Finding the Fourth Proportional to 13,448.01, 18,557.99 and 7,479.55

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Solution

The fourth proportional to 13,448.01, 18,557.99 and 7,479.55 is: 10,321.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,448.01 : 18,557.99 = 7,479.55 : x
  2. Step 2: Convert to fraction form
    13,448.01/18,557.99 = 7,479.55/x
  3. Step 3: Cross multiply
    13,448.01x = 18,557.99 × 7,479.55
  4. Step 4: Simplify right side
    13,448.01x = 138,805,414.10
  5. Step 5: Solve for x
    x = 138,805,414.10/13,448.01
  6. Step 6: Final answer
    x = 10,321.63

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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.