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Finding the Fourth Proportional to 17,831.20, 26,721.20 and 13,114.40

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Solution

The fourth proportional to 17,831.20, 26,721.20 and 13,114.40 is: 19,652.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,831.20 : 26,721.20 = 13,114.40 : x
  2. Step 2: Convert to fraction form
    17,831.20/26,721.20 = 13,114.40/x
  3. Step 3: Cross multiply
    17,831.20x = 26,721.20 × 13,114.40
  4. Step 4: Simplify right side
    17,831.20x = 350,432,505.28
  5. Step 5: Solve for x
    x = 350,432,505.28/17,831.20
  6. Step 6: Final answer
    x = 19,652.77

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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.