Home / 28,487.14-39,308.90-15,739.57

Finding the Fourth Proportional to 28,487.14, 39,308.90 and 15,739.57

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Solution

The fourth proportional to 28,487.14, 39,308.90 and 15,739.57 is: 21,718.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.14 : 39,308.90 = 15,739.57 : x
  2. Step 2: Convert to fraction form
    28,487.14/39,308.90 = 15,739.57/x
  3. Step 3: Cross multiply
    28,487.14x = 39,308.90 × 15,739.57
  4. Step 4: Simplify right side
    28,487.14x = 618,705,183.17
  5. Step 5: Solve for x
    x = 618,705,183.17/28,487.14
  6. Step 6: Final answer
    x = 21,718.75

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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.