Home / 28,920.28-43,381.92-8,145.40

Finding the Fourth Proportional to 28,920.28, 43,381.92 and 8,145.40

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Solution

The fourth proportional to 28,920.28, 43,381.92 and 8,145.40 is: 12,218.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.28 : 43,381.92 = 8,145.40 : x
  2. Step 2: Convert to fraction form
    28,920.28/43,381.92 = 8,145.40/x
  3. Step 3: Cross multiply
    28,920.28x = 43,381.92 × 8,145.40
  4. Step 4: Simplify right side
    28,920.28x = 353,363,091.17
  5. Step 5: Solve for x
    x = 353,363,091.17/28,920.28
  6. Step 6: Final answer
    x = 12,218.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.