Home / 22,421.80-30,932.58-12,986.92

Finding the Fourth Proportional to 22,421.80, 30,932.58 and 12,986.92

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Solution

The fourth proportional to 22,421.80, 30,932.58 and 12,986.92 is: 17,916.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,421.80 : 30,932.58 = 12,986.92 : x
  2. Step 2: Convert to fraction form
    22,421.80/30,932.58 = 12,986.92/x
  3. Step 3: Cross multiply
    22,421.80x = 30,932.58 × 12,986.92
  4. Step 4: Simplify right side
    22,421.80x = 401,718,941.85
  5. Step 5: Solve for x
    x = 401,718,941.85/22,421.80
  6. Step 6: Final answer
    x = 17,916.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.