Home / 39,621.94-54,679.38-21,717.29

Finding the Fourth Proportional to 39,621.94, 54,679.38 and 21,717.29

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Solution

The fourth proportional to 39,621.94, 54,679.38 and 21,717.29 is: 29,970.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,621.94 : 54,679.38 = 21,717.29 : x
  2. Step 2: Convert to fraction form
    39,621.94/54,679.38 = 21,717.29/x
  3. Step 3: Cross multiply
    39,621.94x = 54,679.38 × 21,717.29
  4. Step 4: Simplify right side
    39,621.94x = 1,187,487,952.48
  5. Step 5: Solve for x
    x = 1,187,487,952.48/39,621.94
  6. Step 6: Final answer
    x = 29,970.46

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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.