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Finding the Fourth Proportional to 15,817.85, 21,828.03 and 8,744.39

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Solution

The fourth proportional to 15,817.85, 21,828.03 and 8,744.39 is: 12,066.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,817.85 : 21,828.03 = 8,744.39 : x
  2. Step 2: Convert to fraction form
    15,817.85/21,828.03 = 8,744.39/x
  3. Step 3: Cross multiply
    15,817.85x = 21,828.03 × 8,744.39
  4. Step 4: Simplify right side
    15,817.85x = 190,872,698.11
  5. Step 5: Solve for x
    x = 190,872,698.11/15,817.85
  6. Step 6: Final answer
    x = 12,066.92

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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.