Home / 20,722.78-28,607.02-12,222.04

Finding the Fourth Proportional to 20,722.78, 28,607.02 and 12,222.04

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Solution

The fourth proportional to 20,722.78, 28,607.02 and 12,222.04 is: 16,872.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.78 : 28,607.02 = 12,222.04 : x
  2. Step 2: Convert to fraction form
    20,722.78/28,607.02 = 12,222.04/x
  3. Step 3: Cross multiply
    20,722.78x = 28,607.02 × 12,222.04
  4. Step 4: Simplify right side
    20,722.78x = 349,636,142.72
  5. Step 5: Solve for x
    x = 349,636,142.72/20,722.78
  6. Step 6: Final answer
    x = 16,872.07

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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.