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Finding the Fourth Proportional to 14,513.57, 21,780.05 and 5,279.57

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Solution

The fourth proportional to 14,513.57, 21,780.05 and 5,279.57 is: 7,922.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,513.57 : 21,780.05 = 5,279.57 : x
  2. Step 2: Convert to fraction form
    14,513.57/21,780.05 = 5,279.57/x
  3. Step 3: Cross multiply
    14,513.57x = 21,780.05 × 5,279.57
  4. Step 4: Simplify right side
    14,513.57x = 114,989,163.28
  5. Step 5: Solve for x
    x = 114,989,163.28/14,513.57
  6. Step 6: Final answer
    x = 7,922.88

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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.