Home / 39,621.72-54,677.98-21,716.80

Finding the Fourth Proportional to 39,621.72, 54,677.98 and 21,716.80

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Solution

The fourth proportional to 39,621.72, 54,677.98 and 21,716.80 is: 29,969.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,621.72 : 54,677.98 = 21,716.80 : x
  2. Step 2: Convert to fraction form
    39,621.72/54,677.98 = 21,716.80/x
  3. Step 3: Cross multiply
    39,621.72x = 54,677.98 × 21,716.80
  4. Step 4: Simplify right side
    39,621.72x = 1,187,430,756.06
  5. Step 5: Solve for x
    x = 1,187,430,756.06/39,621.72
  6. Step 6: Final answer
    x = 29,969.19

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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.