Home / 20,723.78-28,608.40-12,223.04

Finding the Fourth Proportional to 20,723.78, 28,608.40 and 12,223.04

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Solution

The fourth proportional to 20,723.78, 28,608.40 and 12,223.04 is: 16,873.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,723.78 : 28,608.40 = 12,223.04 : x
  2. Step 2: Convert to fraction form
    20,723.78/28,608.40 = 12,223.04/x
  3. Step 3: Cross multiply
    20,723.78x = 28,608.40 × 12,223.04
  4. Step 4: Simplify right side
    20,723.78x = 349,681,617.54
  5. Step 5: Solve for x
    x = 349,681,617.54/20,723.78
  6. Step 6: Final answer
    x = 16,873.45

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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.