Home / 21,122.79-29,155.94-12,176.27

Finding the Fourth Proportional to 21,122.79, 29,155.94 and 12,176.27

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Solution

The fourth proportional to 21,122.79, 29,155.94 and 12,176.27 is: 16,806.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.79 : 29,155.94 = 12,176.27 : x
  2. Step 2: Convert to fraction form
    21,122.79/29,155.94 = 12,176.27/x
  3. Step 3: Cross multiply
    21,122.79x = 29,155.94 × 12,176.27
  4. Step 4: Simplify right side
    21,122.79x = 355,010,597.54
  5. Step 5: Solve for x
    x = 355,010,597.54/21,122.79
  6. Step 6: Final answer
    x = 16,806.99

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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.