Home / 39,719.13-54,812.78-21,814.50

Finding the Fourth Proportional to 39,719.13, 54,812.78 and 21,814.50

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Solution

The fourth proportional to 39,719.13, 54,812.78 and 21,814.50 is: 30,104.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,719.13 : 54,812.78 = 21,814.50 : x
  2. Step 2: Convert to fraction form
    39,719.13/54,812.78 = 21,814.50/x
  3. Step 3: Cross multiply
    39,719.13x = 54,812.78 × 21,814.50
  4. Step 4: Simplify right side
    39,719.13x = 1,195,713,280.24
  5. Step 5: Solve for x
    x = 1,195,713,280.24/39,719.13
  6. Step 6: Final answer
    x = 30,104.22

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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.