Home / 20,940.46-28,897.85-11,509.02

Finding the Fourth Proportional to 20,940.46, 28,897.85 and 11,509.02

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Solution

The fourth proportional to 20,940.46, 28,897.85 and 11,509.02 is: 15,882.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.46 : 28,897.85 = 11,509.02 : x
  2. Step 2: Convert to fraction form
    20,940.46/28,897.85 = 11,509.02/x
  3. Step 3: Cross multiply
    20,940.46x = 28,897.85 × 11,509.02
  4. Step 4: Simplify right side
    20,940.46x = 332,585,933.61
  5. Step 5: Solve for x
    x = 332,585,933.61/20,940.46
  6. Step 6: Final answer
    x = 15,882.46

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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.