Home / 39,623.85-54,681.89-21,718.80

Finding the Fourth Proportional to 39,623.85, 54,681.89 and 21,718.80

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Solution

The fourth proportional to 39,623.85, 54,681.89 and 21,718.80 is: 29,972.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,623.85 : 54,681.89 = 21,718.80 : x
  2. Step 2: Convert to fraction form
    39,623.85/54,681.89 = 21,718.80/x
  3. Step 3: Cross multiply
    39,623.85x = 54,681.89 × 21,718.80
  4. Step 4: Simplify right side
    39,623.85x = 1,187,624,923.94
  5. Step 5: Solve for x
    x = 1,187,624,923.94/39,623.85
  6. Step 6: Final answer
    x = 29,972.48

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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.