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Finding the Fourth Proportional to 27,889.66, 38,487.78 and 15,953.08

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Solution

The fourth proportional to 27,889.66, 38,487.78 and 15,953.08 is: 22,015.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,889.66 : 38,487.78 = 15,953.08 : x
  2. Step 2: Convert to fraction form
    27,889.66/38,487.78 = 15,953.08/x
  3. Step 3: Cross multiply
    27,889.66x = 38,487.78 × 15,953.08
  4. Step 4: Simplify right side
    27,889.66x = 613,998,633.36
  5. Step 5: Solve for x
    x = 613,998,633.36/27,889.66
  6. Step 6: Final answer
    x = 22,015.28

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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.