Home / 39,621.40-54,677.20-21,716.36

Finding the Fourth Proportional to 39,621.40, 54,677.20 and 21,716.36

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Solution

The fourth proportional to 39,621.40, 54,677.20 and 21,716.36 is: 29,968.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,621.40 : 54,677.20 = 21,716.36 : x
  2. Step 2: Convert to fraction form
    39,621.40/54,677.20 = 21,716.36/x
  3. Step 3: Cross multiply
    39,621.40x = 54,677.20 × 21,716.36
  4. Step 4: Simplify right side
    39,621.40x = 1,187,389,776.59
  5. Step 5: Solve for x
    x = 1,187,389,776.59/39,621.40
  6. Step 6: Final answer
    x = 29,968.40

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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.