Home / 10,981.40-16,439.70-7,287.80

Finding the Fourth Proportional to 10,981.40, 16,439.70 and 7,287.80

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Solution

The fourth proportional to 10,981.40, 16,439.70 and 7,287.80 is: 10,910.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,981.40 : 16,439.70 = 7,287.80 : x
  2. Step 2: Convert to fraction form
    10,981.40/16,439.70 = 7,287.80/x
  3. Step 3: Cross multiply
    10,981.40x = 16,439.70 × 7,287.80
  4. Step 4: Simplify right side
    10,981.40x = 119,809,245.66
  5. Step 5: Solve for x
    x = 119,809,245.66/10,981.40
  6. Step 6: Final answer
    x = 10,910.20

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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.