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Finding the Fourth Proportional to 13,448.16, 18,556.47 and 7,479.90

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Solution

The fourth proportional to 13,448.16, 18,556.47 and 7,479.90 is: 10,321.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,448.16 : 18,556.47 = 7,479.90 : x
  2. Step 2: Convert to fraction form
    13,448.16/18,556.47 = 7,479.90/x
  3. Step 3: Cross multiply
    13,448.16x = 18,556.47 × 7,479.90
  4. Step 4: Simplify right side
    13,448.16x = 138,800,539.95
  5. Step 5: Solve for x
    x = 138,800,539.95/13,448.16
  6. Step 6: Final answer
    x = 10,321.15

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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.