Home / 22,785.42-31,420.89-15,231.78

Finding the Fourth Proportional to 22,785.42, 31,420.89 and 15,231.78

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Solution

The fourth proportional to 22,785.42, 31,420.89 and 15,231.78 is: 21,004.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,785.42 : 31,420.89 = 15,231.78 : x
  2. Step 2: Convert to fraction form
    22,785.42/31,420.89 = 15,231.78/x
  3. Step 3: Cross multiply
    22,785.42x = 31,420.89 × 15,231.78
  4. Step 4: Simplify right side
    22,785.42x = 478,596,083.88
  5. Step 5: Solve for x
    x = 478,596,083.88/22,785.42
  6. Step 6: Final answer
    x = 21,004.49

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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.