Home / 29,286.18-40,420.89-19,857.78

Finding the Fourth Proportional to 29,286.18, 40,420.89 and 19,857.78

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Solution

The fourth proportional to 29,286.18, 40,420.89 and 19,857.78 is: 27,407.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,286.18 : 40,420.89 = 19,857.78 : x
  2. Step 2: Convert to fraction form
    29,286.18/40,420.89 = 19,857.78/x
  3. Step 3: Cross multiply
    29,286.18x = 40,420.89 × 19,857.78
  4. Step 4: Simplify right side
    29,286.18x = 802,669,141.02
  5. Step 5: Solve for x
    x = 802,669,141.02/29,286.18
  6. Step 6: Final answer
    x = 27,407.78

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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.