Home / 20,979.91-31,465.68-13,461.22

Finding the Fourth Proportional to 20,979.91, 31,465.68 and 13,461.22

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Solution

The fourth proportional to 20,979.91, 31,465.68 and 13,461.22 is: 20,189.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.91 : 31,465.68 = 13,461.22 : x
  2. Step 2: Convert to fraction form
    20,979.91/31,465.68 = 13,461.22/x
  3. Step 3: Cross multiply
    20,979.91x = 31,465.68 × 13,461.22
  4. Step 4: Simplify right side
    20,979.91x = 423,566,440.93
  5. Step 5: Solve for x
    x = 423,566,440.93/20,979.91
  6. Step 6: Final answer
    x = 20,189.14

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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.