Home / 20,311.09-30,478.28-10,951.07

Finding the Fourth Proportional to 20,311.09, 30,478.28 and 10,951.07

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Solution

The fourth proportional to 20,311.09, 30,478.28 and 10,951.07 is: 16,432.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.09 : 30,478.28 = 10,951.07 : x
  2. Step 2: Convert to fraction form
    20,311.09/30,478.28 = 10,951.07/x
  3. Step 3: Cross multiply
    20,311.09x = 30,478.28 × 10,951.07
  4. Step 4: Simplify right side
    20,311.09x = 333,769,570.61
  5. Step 5: Solve for x
    x = 333,769,570.61/20,311.09
  6. Step 6: Final answer
    x = 16,432.88

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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.