Home / 20,864.05-31,109.97-18,545.83

Finding the Fourth Proportional to 20,864.05, 31,109.97 and 18,545.83

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Solution

The fourth proportional to 20,864.05, 31,109.97 and 18,545.83 is: 27,653.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.05 : 31,109.97 = 18,545.83 : x
  2. Step 2: Convert to fraction form
    20,864.05/31,109.97 = 18,545.83/x
  3. Step 3: Cross multiply
    20,864.05x = 31,109.97 × 18,545.83
  4. Step 4: Simplify right side
    20,864.05x = 576,960,206.70
  5. Step 5: Solve for x
    x = 576,960,206.70/20,864.05
  6. Step 6: Final answer
    x = 27,653.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.