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Finding the Fourth Proportional to 19,889.65, 27,447.78 and 10,937.71

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Solution

The fourth proportional to 19,889.65, 27,447.78 and 10,937.71 is: 15,094.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,889.65 : 27,447.78 = 10,937.71 : x
  2. Step 2: Convert to fraction form
    19,889.65/27,447.78 = 10,937.71/x
  3. Step 3: Cross multiply
    19,889.65x = 27,447.78 × 10,937.71
  4. Step 4: Simplify right side
    19,889.65x = 300,215,857.78
  5. Step 5: Solve for x
    x = 300,215,857.78/19,889.65
  6. Step 6: Final answer
    x = 15,094.07

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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.