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Finding the Fourth Proportional to 27,889.84, 38,478.50 and 15,944.72

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Solution

The fourth proportional to 27,889.84, 38,478.50 and 15,944.72 is: 21,998.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,889.84 : 38,478.50 = 15,944.72 : x
  2. Step 2: Convert to fraction form
    27,889.84/38,478.50 = 15,944.72/x
  3. Step 3: Cross multiply
    27,889.84x = 38,478.50 × 15,944.72
  4. Step 4: Simplify right side
    27,889.84x = 613,528,908.52
  5. Step 5: Solve for x
    x = 613,528,908.52/27,889.84
  6. Step 6: Final answer
    x = 21,998.29

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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.