Home / 21,442.68-31,869.99-20,860.92

Finding the Fourth Proportional to 21,442.68, 31,869.99 and 20,860.92

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Solution

The fourth proportional to 21,442.68, 31,869.99 and 20,860.92 is: 31,005.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,442.68 : 31,869.99 = 20,860.92 : x
  2. Step 2: Convert to fraction form
    21,442.68/31,869.99 = 20,860.92/x
  3. Step 3: Cross multiply
    21,442.68x = 31,869.99 × 20,860.92
  4. Step 4: Simplify right side
    21,442.68x = 664,837,311.79
  5. Step 5: Solve for x
    x = 664,837,311.79/21,442.68
  6. Step 6: Final answer
    x = 31,005.33

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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.