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Finding the Fourth Proportional to 20,029.19, 30,034.65 and 10,666.79

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Solution

The fourth proportional to 20,029.19, 30,034.65 and 10,666.79 is: 15,995.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,029.19 : 30,034.65 = 10,666.79 : x
  2. Step 2: Convert to fraction form
    20,029.19/30,034.65 = 10,666.79/x
  3. Step 3: Cross multiply
    20,029.19x = 30,034.65 × 10,666.79
  4. Step 4: Simplify right side
    20,029.19x = 320,373,304.27
  5. Step 5: Solve for x
    x = 320,373,304.27/20,029.19
  6. Step 6: Final answer
    x = 15,995.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.