Home / 20,507.64-28,287.54-12,940.76

Finding the Fourth Proportional to 20,507.64, 28,287.54 and 12,940.76

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Solution

The fourth proportional to 20,507.64, 28,287.54 and 12,940.76 is: 17,850.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,507.64 : 28,287.54 = 12,940.76 : x
  2. Step 2: Convert to fraction form
    20,507.64/28,287.54 = 12,940.76/x
  3. Step 3: Cross multiply
    20,507.64x = 28,287.54 × 12,940.76
  4. Step 4: Simplify right side
    20,507.64x = 366,062,124.69
  5. Step 5: Solve for x
    x = 366,062,124.69/20,507.64
  6. Step 6: Final answer
    x = 17,850.04

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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.