Home / 28,432.72-39,238.51-15,855.04

Finding the Fourth Proportional to 28,432.72, 39,238.51 and 15,855.04

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Solution

The fourth proportional to 28,432.72, 39,238.51 and 15,855.04 is: 21,880.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,432.72 : 39,238.51 = 15,855.04 : x
  2. Step 2: Convert to fraction form
    28,432.72/39,238.51 = 15,855.04/x
  3. Step 3: Cross multiply
    28,432.72x = 39,238.51 × 15,855.04
  4. Step 4: Simplify right side
    28,432.72x = 622,127,949.40
  5. Step 5: Solve for x
    x = 622,127,949.40/28,432.72
  6. Step 6: Final answer
    x = 21,880.71

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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.