Home / 39,649.50-54,711.29-21,739.80

Finding the Fourth Proportional to 39,649.50, 54,711.29 and 21,739.80

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Solution

The fourth proportional to 39,649.50, 54,711.29 and 21,739.80 is: 29,998.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,649.50 : 54,711.29 = 21,739.80 : x
  2. Step 2: Convert to fraction form
    39,649.50/54,711.29 = 21,739.80/x
  3. Step 3: Cross multiply
    39,649.50x = 54,711.29 × 21,739.80
  4. Step 4: Simplify right side
    39,649.50x = 1,189,412,393.64
  5. Step 5: Solve for x
    x = 1,189,412,393.64/39,649.50
  6. Step 6: Final answer
    x = 29,998.17

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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.