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Finding the Fourth Proportional to 18,275.60, 25,145.16 and 17,109.20

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Solution

The fourth proportional to 18,275.60, 25,145.16 and 17,109.20 is: 23,540.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,275.60 : 25,145.16 = 17,109.20 : x
  2. Step 2: Convert to fraction form
    18,275.60/25,145.16 = 17,109.20/x
  3. Step 3: Cross multiply
    18,275.60x = 25,145.16 × 17,109.20
  4. Step 4: Simplify right side
    18,275.60x = 430,213,571.47
  5. Step 5: Solve for x
    x = 430,213,571.47/18,275.60
  6. Step 6: Final answer
    x = 23,540.33

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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.