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Finding the Fourth Proportional to 17,909.40, 26,831.70 and 10,975.80

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Solution

The fourth proportional to 17,909.40, 26,831.70 and 10,975.80 is: 16,443.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,909.40 : 26,831.70 = 10,975.80 : x
  2. Step 2: Convert to fraction form
    17,909.40/26,831.70 = 10,975.80/x
  3. Step 3: Cross multiply
    17,909.40x = 26,831.70 × 10,975.80
  4. Step 4: Simplify right side
    17,909.40x = 294,499,372.86
  5. Step 5: Solve for x
    x = 294,499,372.86/17,909.40
  6. Step 6: Final answer
    x = 16,443.84

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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.