Home / 18,715.50-28,114.20-13,816.62

Finding the Fourth Proportional to 18,715.50, 28,114.20 and 13,816.62

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Solution

The fourth proportional to 18,715.50, 28,114.20 and 13,816.62 is: 20,755.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.50 : 28,114.20 = 13,816.62 : x
  2. Step 2: Convert to fraction form
    18,715.50/28,114.20 = 13,816.62/x
  3. Step 3: Cross multiply
    18,715.50x = 28,114.20 × 13,816.62
  4. Step 4: Simplify right side
    18,715.50x = 388,443,218.00
  5. Step 5: Solve for x
    x = 388,443,218.00/18,715.50
  6. Step 6: Final answer
    x = 20,755.16

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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.