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Finding the Fourth Proportional to 27,889, 38,486.82 and 15,314.56

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Solution

The fourth proportional to 27,889, 38,486.82 and 15,314.56 is: 21,134.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,889 : 38,486.82 = 15,314.56 : x
  2. Step 2: Convert to fraction form
    27,889/38,486.82 = 15,314.56/x
  3. Step 3: Cross multiply
    27,889x = 38,486.82 × 15,314.56
  4. Step 4: Simplify right side
    27,889x = 589,408,714.10
  5. Step 5: Solve for x
    x = 589,408,714.10/27,889
  6. Step 6: Final answer
    x = 21,134.09

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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.