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Finding the Fourth Proportional to 15,104.19, 20,843.48 and 8,389.63

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Solution

The fourth proportional to 15,104.19, 20,843.48 and 8,389.63 is: 11,577.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,104.19 : 20,843.48 = 8,389.63 : x
  2. Step 2: Convert to fraction form
    15,104.19/20,843.48 = 8,389.63/x
  3. Step 3: Cross multiply
    15,104.19x = 20,843.48 × 8,389.63
  4. Step 4: Simplify right side
    15,104.19x = 174,868,938.95
  5. Step 5: Solve for x
    x = 174,868,938.95/15,104.19
  6. Step 6: Final answer
    x = 11,577.51

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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.