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Finding the Fourth Proportional to 14,347.85, 19,799.87 and 8,380.40

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Solution

The fourth proportional to 14,347.85, 19,799.87 and 8,380.40 is: 11,564.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,347.85 : 19,799.87 = 8,380.40 : x
  2. Step 2: Convert to fraction form
    14,347.85/19,799.87 = 8,380.40/x
  3. Step 3: Cross multiply
    14,347.85x = 19,799.87 × 8,380.40
  4. Step 4: Simplify right side
    14,347.85x = 165,930,689.65
  5. Step 5: Solve for x
    x = 165,930,689.65/14,347.85
  6. Step 6: Final answer
    x = 11,564.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.