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Finding the Fourth Proportional to 15,278.80, 22,885.80 and 12,686.80

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Solution

The fourth proportional to 15,278.80, 22,885.80 and 12,686.80 is: 19,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.80 : 22,885.80 = 12,686.80 : x
  2. Step 2: Convert to fraction form
    15,278.80/22,885.80 = 12,686.80/x
  3. Step 3: Cross multiply
    15,278.80x = 22,885.80 × 12,686.80
  4. Step 4: Simplify right side
    15,278.80x = 290,347,567.44
  5. Step 5: Solve for x
    x = 290,347,567.44/15,278.80
  6. Step 6: Final answer
    x = 19,003.30

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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.