Home / 20,031.48-30,034.50-10,665.72

Finding the Fourth Proportional to 20,031.48, 30,034.50 and 10,665.72

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Solution

The fourth proportional to 20,031.48, 30,034.50 and 10,665.72 is: 15,991.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,031.48 : 30,034.50 = 10,665.72 : x
  2. Step 2: Convert to fraction form
    20,031.48/30,034.50 = 10,665.72/x
  3. Step 3: Cross multiply
    20,031.48x = 30,034.50 × 10,665.72
  4. Step 4: Simplify right side
    20,031.48x = 320,339,567.34
  5. Step 5: Solve for x
    x = 320,339,567.34/20,031.48
  6. Step 6: Final answer
    x = 15,991.81

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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.