Home / 28,491.68-39,318.38-15,745.76

Finding the Fourth Proportional to 28,491.68, 39,318.38 and 15,745.76

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Solution

The fourth proportional to 28,491.68, 39,318.38 and 15,745.76 is: 21,729.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.68 : 39,318.38 = 15,745.76 : x
  2. Step 2: Convert to fraction form
    28,491.68/39,318.38 = 15,745.76/x
  3. Step 3: Cross multiply
    28,491.68x = 39,318.38 × 15,745.76
  4. Step 4: Simplify right side
    28,491.68x = 619,097,499.75
  5. Step 5: Solve for x
    x = 619,097,499.75/28,491.68
  6. Step 6: Final answer
    x = 21,729.07

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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.