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Finding the Fourth Proportional to 15,818.67, 21,828.89 and 8,744.63

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Solution

The fourth proportional to 15,818.67, 21,828.89 and 8,744.63 is: 12,067.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,818.67 : 21,828.89 = 8,744.63 : x
  2. Step 2: Convert to fraction form
    15,818.67/21,828.89 = 8,744.63/x
  3. Step 3: Cross multiply
    15,818.67x = 21,828.89 × 8,744.63
  4. Step 4: Simplify right side
    15,818.67x = 190,885,479.08
  5. Step 5: Solve for x
    x = 190,885,479.08/15,818.67
  6. Step 6: Final answer
    x = 12,067.10

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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.