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Finding the Fourth Proportional to 17,761.60, 26,689.20 and 9,870.40

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Solution

The fourth proportional to 17,761.60, 26,689.20 and 9,870.40 is: 14,831.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,761.60 : 26,689.20 = 9,870.40 : x
  2. Step 2: Convert to fraction form
    17,761.60/26,689.20 = 9,870.40/x
  3. Step 3: Cross multiply
    17,761.60x = 26,689.20 × 9,870.40
  4. Step 4: Simplify right side
    17,761.60x = 263,433,079.68
  5. Step 5: Solve for x
    x = 263,433,079.68/17,761.60
  6. Step 6: Final answer
    x = 14,831.61

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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.