Home / 19,140.65-28,717.55-8,618.05

Finding the Fourth Proportional to 19,140.65, 28,717.55 and 8,618.05

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Solution

The fourth proportional to 19,140.65, 28,717.55 and 8,618.05 is: 12,930.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140.65 : 28,717.55 = 8,618.05 : x
  2. Step 2: Convert to fraction form
    19,140.65/28,717.55 = 8,618.05/x
  3. Step 3: Cross multiply
    19,140.65x = 28,717.55 × 8,618.05
  4. Step 4: Simplify right side
    19,140.65x = 247,489,281.78
  5. Step 5: Solve for x
    x = 247,489,281.78/19,140.65
  6. Step 6: Final answer
    x = 12,930.04

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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.