Home / 20,505.50-28,289.49-12,949.01

Finding the Fourth Proportional to 20,505.50, 28,289.49 and 12,949.01

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Solution

The fourth proportional to 20,505.50, 28,289.49 and 12,949.01 is: 17,864.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.50 : 28,289.49 = 12,949.01 : x
  2. Step 2: Convert to fraction form
    20,505.50/28,289.49 = 12,949.01/x
  3. Step 3: Cross multiply
    20,505.50x = 28,289.49 × 12,949.01
  4. Step 4: Simplify right side
    20,505.50x = 366,320,888.90
  5. Step 5: Solve for x
    x = 366,320,888.90/20,505.50
  6. Step 6: Final answer
    x = 17,864.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.