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Finding the Fourth Proportional to 15,268.20, 21,070 and 8,553.80

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Solution

The fourth proportional to 15,268.20, 21,070 and 8,553.80 is: 11,804.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,268.20 : 21,070 = 8,553.80 : x
  2. Step 2: Convert to fraction form
    15,268.20/21,070 = 8,553.80/x
  3. Step 3: Cross multiply
    15,268.20x = 21,070 × 8,553.80
  4. Step 4: Simplify right side
    15,268.20x = 180,228,566.00
  5. Step 5: Solve for x
    x = 180,228,566.00/15,268.20
  6. Step 6: Final answer
    x = 11,804.18

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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.