Home / 39,717.71-54,810.36-21,812.87

Finding the Fourth Proportional to 39,717.71, 54,810.36 and 21,812.87

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Solution

The fourth proportional to 39,717.71, 54,810.36 and 21,812.87 is: 30,101.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,717.71 : 54,810.36 = 21,812.87 : x
  2. Step 2: Convert to fraction form
    39,717.71/54,810.36 = 21,812.87/x
  3. Step 3: Cross multiply
    39,717.71x = 54,810.36 × 21,812.87
  4. Step 4: Simplify right side
    39,717.71x = 1,195,570,983.28
  5. Step 5: Solve for x
    x = 1,195,570,983.28/39,717.71
  6. Step 6: Final answer
    x = 30,101.71

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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.