Home / 21,857.23-30,144.31-18,470.62

Finding the Fourth Proportional to 21,857.23, 30,144.31 and 18,470.62

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Solution

The fourth proportional to 21,857.23, 30,144.31 and 18,470.62 is: 25,473.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,857.23 : 30,144.31 = 18,470.62 : x
  2. Step 2: Convert to fraction form
    21,857.23/30,144.31 = 18,470.62/x
  3. Step 3: Cross multiply
    21,857.23x = 30,144.31 × 18,470.62
  4. Step 4: Simplify right side
    21,857.23x = 556,784,095.17
  5. Step 5: Solve for x
    x = 556,784,095.17/21,857.23
  6. Step 6: Final answer
    x = 25,473.68

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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.