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Finding the Fourth Proportional to 15,302.97, 21,118.49 and 8,589.11

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Solution

The fourth proportional to 15,302.97, 21,118.49 and 8,589.11 is: 11,853.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,302.97 : 21,118.49 = 8,589.11 : x
  2. Step 2: Convert to fraction form
    15,302.97/21,118.49 = 8,589.11/x
  3. Step 3: Cross multiply
    15,302.97x = 21,118.49 × 8,589.11
  4. Step 4: Simplify right side
    15,302.97x = 181,389,033.64
  5. Step 5: Solve for x
    x = 181,389,033.64/15,302.97
  6. Step 6: Final answer
    x = 11,853.19

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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.