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Finding the Fourth Proportional to 19,890, 27,446.40 and 10,937.88

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Solution

The fourth proportional to 19,890, 27,446.40 and 10,937.88 is: 15,093.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890 : 27,446.40 = 10,937.88 : x
  2. Step 2: Convert to fraction form
    19,890/27,446.40 = 10,937.88/x
  3. Step 3: Cross multiply
    19,890x = 27,446.40 × 10,937.88
  4. Step 4: Simplify right side
    19,890x = 300,205,429.63
  5. Step 5: Solve for x
    x = 300,205,429.63/19,890
  6. Step 6: Final answer
    x = 15,093.28

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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.