Home / 39,678.17-54,754.00-21,772.79

Finding the Fourth Proportional to 39,678.17, 54,754.00 and 21,772.79

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Solution

The fourth proportional to 39,678.17, 54,754.00 and 21,772.79 is: 30,045.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,678.17 : 54,754.00 = 21,772.79 : x
  2. Step 2: Convert to fraction form
    39,678.17/54,754.00 = 21,772.79/x
  3. Step 3: Cross multiply
    39,678.17x = 54,754.00 × 21,772.79
  4. Step 4: Simplify right side
    39,678.17x = 1,192,147,015.46
  5. Step 5: Solve for x
    x = 1,192,147,015.46/39,678.17
  6. Step 6: Final answer
    x = 30,045.41

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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.