Home / 28,259.92-39,000.72-15,684.58

Finding the Fourth Proportional to 28,259.92, 39,000.72 and 15,684.58

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Solution

The fourth proportional to 28,259.92, 39,000.72 and 15,684.58 is: 21,645.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,259.92 : 39,000.72 = 15,684.58 : x
  2. Step 2: Convert to fraction form
    28,259.92/39,000.72 = 15,684.58/x
  3. Step 3: Cross multiply
    28,259.92x = 39,000.72 × 15,684.58
  4. Step 4: Simplify right side
    28,259.92x = 611,709,912.90
  5. Step 5: Solve for x
    x = 611,709,912.90/28,259.92
  6. Step 6: Final answer
    x = 21,645.85

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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.