Home / 20,721.11-31,081.64-9,621.73

Finding the Fourth Proportional to 20,721.11, 31,081.64 and 9,621.73

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Solution

The fourth proportional to 20,721.11, 31,081.64 and 9,621.73 is: 14,432.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.11 : 31,081.64 = 9,621.73 : x
  2. Step 2: Convert to fraction form
    20,721.11/31,081.64 = 9,621.73/x
  3. Step 3: Cross multiply
    20,721.11x = 31,081.64 × 9,621.73
  4. Step 4: Simplify right side
    20,721.11x = 299,059,022.22
  5. Step 5: Solve for x
    x = 299,059,022.22/20,721.11
  6. Step 6: Final answer
    x = 14,432.58

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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.