Home / 21,178.43-31,705.23-18,551.07

Finding the Fourth Proportional to 21,178.43, 31,705.23 and 18,551.07

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Solution

The fourth proportional to 21,178.43, 31,705.23 and 18,551.07 is: 27,771.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.43 : 31,705.23 = 18,551.07 : x
  2. Step 2: Convert to fraction form
    21,178.43/31,705.23 = 18,551.07/x
  3. Step 3: Cross multiply
    21,178.43x = 31,705.23 × 18,551.07
  4. Step 4: Simplify right side
    21,178.43x = 588,165,941.10
  5. Step 5: Solve for x
    x = 588,165,941.10/21,178.43
  6. Step 6: Final answer
    x = 27,771.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.