Home / 18,920.20-28,331.70-14,999.80

Finding the Fourth Proportional to 18,920.20, 28,331.70 and 14,999.80

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Solution

The fourth proportional to 18,920.20, 28,331.70 and 14,999.80 is: 22,461.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.20 : 28,331.70 = 14,999.80 : x
  2. Step 2: Convert to fraction form
    18,920.20/28,331.70 = 14,999.80/x
  3. Step 3: Cross multiply
    18,920.20x = 28,331.70 × 14,999.80
  4. Step 4: Simplify right side
    18,920.20x = 424,969,833.66
  5. Step 5: Solve for x
    x = 424,969,833.66/18,920.20
  6. Step 6: Final answer
    x = 22,461.17

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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.