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Finding the Fourth Proportional to 15,059.70, 20,780.70 and 8,343.65

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Solution

The fourth proportional to 15,059.70, 20,780.70 and 8,343.65 is: 11,513.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,059.70 : 20,780.70 = 8,343.65 : x
  2. Step 2: Convert to fraction form
    15,059.70/20,780.70 = 8,343.65/x
  3. Step 3: Cross multiply
    15,059.70x = 20,780.70 × 8,343.65
  4. Step 4: Simplify right side
    15,059.70x = 173,386,887.56
  5. Step 5: Solve for x
    x = 173,386,887.56/15,059.70
  6. Step 6: Final answer
    x = 11,513.30

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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.