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Finding the Fourth Proportional to 15,818.34, 21,828.45 and 8,744.34

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Solution

The fourth proportional to 15,818.34, 21,828.45 and 8,744.34 is: 12,066.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,818.34 : 21,828.45 = 8,744.34 : x
  2. Step 2: Convert to fraction form
    15,818.34/21,828.45 = 8,744.34/x
  3. Step 3: Cross multiply
    15,818.34x = 21,828.45 × 8,744.34
  4. Step 4: Simplify right side
    15,818.34x = 190,875,388.47
  5. Step 5: Solve for x
    x = 190,875,388.47/15,818.34
  6. Step 6: Final answer
    x = 12,066.71

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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.