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Finding the Fourth Proportional to 18,920.91, 28,398.87 and 9,567.57

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Solution

The fourth proportional to 18,920.91, 28,398.87 and 9,567.57 is: 14,360.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.91 : 28,398.87 = 9,567.57 : x
  2. Step 2: Convert to fraction form
    18,920.91/28,398.87 = 9,567.57/x
  3. Step 3: Cross multiply
    18,920.91x = 28,398.87 × 9,567.57
  4. Step 4: Simplify right side
    18,920.91x = 271,708,176.65
  5. Step 5: Solve for x
    x = 271,708,176.65/18,920.91
  6. Step 6: Final answer
    x = 14,360.21

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1.5x scale

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.