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Finding the Fourth Proportional to 27,889.39, 38,486.87 and 15,314.05

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Solution

The fourth proportional to 27,889.39, 38,486.87 and 15,314.05 is: 21,133.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,889.39 : 38,486.87 = 15,314.05 : x
  2. Step 2: Convert to fraction form
    27,889.39/38,486.87 = 15,314.05/x
  3. Step 3: Cross multiply
    27,889.39x = 38,486.87 × 15,314.05
  4. Step 4: Simplify right side
    27,889.39x = 589,389,659.09
  5. Step 5: Solve for x
    x = 589,389,659.09/27,889.39
  6. Step 6: Final answer
    x = 21,133.12

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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.