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Finding the Fourth Proportional to 15,078.80, 22,585.80 and 12,486.80

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Solution

The fourth proportional to 15,078.80, 22,585.80 and 12,486.80 is: 18,703.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,078.80 : 22,585.80 = 12,486.80 : x
  2. Step 2: Convert to fraction form
    15,078.80/22,585.80 = 12,486.80/x
  3. Step 3: Cross multiply
    15,078.80x = 22,585.80 × 12,486.80
  4. Step 4: Simplify right side
    15,078.80x = 282,024,367.44
  5. Step 5: Solve for x
    x = 282,024,367.44/15,078.80
  6. Step 6: Final answer
    x = 18,703.37

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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.