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Finding the Fourth Proportional to 18,886.30, 28,259.57 and 11,394.20

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Solution

The fourth proportional to 18,886.30, 28,259.57 and 11,394.20 is: 17,049.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,886.30 : 28,259.57 = 11,394.20 : x
  2. Step 2: Convert to fraction form
    18,886.30/28,259.57 = 11,394.20/x
  3. Step 3: Cross multiply
    18,886.30x = 28,259.57 × 11,394.20
  4. Step 4: Simplify right side
    18,886.30x = 321,995,192.49
  5. Step 5: Solve for x
    x = 321,995,192.49/18,886.30
  6. Step 6: Final answer
    x = 17,049.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.