Home / 28,689.23-39,589.84-15,942.35

Finding the Fourth Proportional to 28,689.23, 39,589.84 and 15,942.35

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Solution

The fourth proportional to 28,689.23, 39,589.84 and 15,942.35 is: 21,999.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.23 : 39,589.84 = 15,942.35 : x
  2. Step 2: Convert to fraction form
    28,689.23/39,589.84 = 15,942.35/x
  3. Step 3: Cross multiply
    28,689.23x = 39,589.84 × 15,942.35
  4. Step 4: Simplify right side
    28,689.23x = 631,155,144.84
  5. Step 5: Solve for x
    x = 631,155,144.84/28,689.23
  6. Step 6: Final answer
    x = 21,999.72

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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.