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Finding the Fourth Proportional to 18,660.60, 27,959.38 and 15,719.09

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Solution

The fourth proportional to 18,660.60, 27,959.38 and 15,719.09 is: 23,552.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660.60 : 27,959.38 = 15,719.09 : x
  2. Step 2: Convert to fraction form
    18,660.60/27,959.38 = 15,719.09/x
  3. Step 3: Cross multiply
    18,660.60x = 27,959.38 × 15,719.09
  4. Step 4: Simplify right side
    18,660.60x = 439,495,831.47
  5. Step 5: Solve for x
    x = 439,495,831.47/18,660.60
  6. Step 6: Final answer
    x = 23,552.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.