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Finding the Fourth Proportional to 15,818.12, 21,829.42 and 8,648.34

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Solution

The fourth proportional to 15,818.12, 21,829.42 and 8,648.34 is: 11,934.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,818.12 : 21,829.42 = 8,648.34 : x
  2. Step 2: Convert to fraction form
    15,818.12/21,829.42 = 8,648.34/x
  3. Step 3: Cross multiply
    15,818.12x = 21,829.42 × 8,648.34
  4. Step 4: Simplify right side
    15,818.12x = 188,788,246.16
  5. Step 5: Solve for x
    x = 188,788,246.16/15,818.12
  6. Step 6: Final answer
    x = 11,934.94

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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.