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Finding the Fourth Proportional to 15,279.80, 22,887.30 and 12,687.80

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Solution

The fourth proportional to 15,279.80, 22,887.30 and 12,687.80 is: 19,004.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.80 : 22,887.30 = 12,687.80 : x
  2. Step 2: Convert to fraction form
    15,279.80/22,887.30 = 12,687.80/x
  3. Step 3: Cross multiply
    15,279.80x = 22,887.30 × 12,687.80
  4. Step 4: Simplify right side
    15,279.80x = 290,389,484.94
  5. Step 5: Solve for x
    x = 290,389,484.94/15,279.80
  6. Step 6: Final answer
    x = 19,004.80

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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.