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Finding the Fourth Proportional to 17,890, 26,831.31 and 10,388.86

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Solution

The fourth proportional to 17,890, 26,831.31 and 10,388.86 is: 15,581.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,890 : 26,831.31 = 10,388.86 : x
  2. Step 2: Convert to fraction form
    17,890/26,831.31 = 10,388.86/x
  3. Step 3: Cross multiply
    17,890x = 26,831.31 × 10,388.86
  4. Step 4: Simplify right side
    17,890x = 278,746,723.21
  5. Step 5: Solve for x
    x = 278,746,723.21/17,890
  6. Step 6: Final answer
    x = 15,581.15

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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.