Home / 20,719.05-28,591.95-11,287.54

Finding the Fourth Proportional to 20,719.05, 28,591.95 and 11,287.54

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Solution

The fourth proportional to 20,719.05, 28,591.95 and 11,287.54 is: 15,576.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.05 : 28,591.95 = 11,287.54 : x
  2. Step 2: Convert to fraction form
    20,719.05/28,591.95 = 11,287.54/x
  3. Step 3: Cross multiply
    20,719.05x = 28,591.95 × 11,287.54
  4. Step 4: Simplify right side
    20,719.05x = 322,732,779.30
  5. Step 5: Solve for x
    x = 322,732,779.30/20,719.05
  6. Step 6: Final answer
    x = 15,576.62

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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.