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Finding the Fourth Proportional to 20,064.35, 27,689.70 and 10,990.35

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Solution

The fourth proportional to 20,064.35, 27,689.70 and 10,990.35 is: 15,167.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,064.35 : 27,689.70 = 10,990.35 : x
  2. Step 2: Convert to fraction form
    20,064.35/27,689.70 = 10,990.35/x
  3. Step 3: Cross multiply
    20,064.35x = 27,689.70 × 10,990.35
  4. Step 4: Simplify right side
    20,064.35x = 304,319,556.48
  5. Step 5: Solve for x
    x = 304,319,556.48/20,064.35
  6. Step 6: Final answer
    x = 15,167.18

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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.