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Finding the Fourth Proportional to 15,033.60, 20,744.91 and 8,319.11

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Solution

The fourth proportional to 15,033.60, 20,744.91 and 8,319.11 is: 11,479.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,033.60 : 20,744.91 = 8,319.11 : x
  2. Step 2: Convert to fraction form
    15,033.60/20,744.91 = 8,319.11/x
  3. Step 3: Cross multiply
    15,033.60x = 20,744.91 × 8,319.11
  4. Step 4: Simplify right side
    15,033.60x = 172,579,084.51
  5. Step 5: Solve for x
    x = 172,579,084.51/15,033.60
  6. Step 6: Final answer
    x = 11,479.56

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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.