Home / 19,215.10-28,826.43-8,121.70

Finding the Fourth Proportional to 19,215.10, 28,826.43 and 8,121.70

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Solution

The fourth proportional to 19,215.10, 28,826.43 and 8,121.70 is: 12,184.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,215.10 : 28,826.43 = 8,121.70 : x
  2. Step 2: Convert to fraction form
    19,215.10/28,826.43 = 8,121.70/x
  3. Step 3: Cross multiply
    19,215.10x = 28,826.43 × 8,121.70
  4. Step 4: Simplify right side
    19,215.10x = 234,119,616.53
  5. Step 5: Solve for x
    x = 234,119,616.53/19,215.10
  6. Step 6: Final answer
    x = 12,184.15

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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.