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Finding the Fourth Proportional to 15,042.74, 20,759.16 and 8,328.98

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Solution

The fourth proportional to 15,042.74, 20,759.16 and 8,328.98 is: 11,494.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,042.74 : 20,759.16 = 8,328.98 : x
  2. Step 2: Convert to fraction form
    15,042.74/20,759.16 = 8,328.98/x
  3. Step 3: Cross multiply
    15,042.74x = 20,759.16 × 8,328.98
  4. Step 4: Simplify right side
    15,042.74x = 172,902,628.46
  5. Step 5: Solve for x
    x = 172,902,628.46/15,042.74
  6. Step 6: Final answer
    x = 11,494.09

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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.