Home / 39,678.26-54,756.41-21,774.42

Finding the Fourth Proportional to 39,678.26, 54,756.41 and 21,774.42

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Solution

The fourth proportional to 39,678.26, 54,756.41 and 21,774.42 is: 30,048.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,678.26 : 54,756.41 = 21,774.42 : x
  2. Step 2: Convert to fraction form
    39,678.26/54,756.41 = 21,774.42/x
  3. Step 3: Cross multiply
    39,678.26x = 54,756.41 × 21,774.42
  4. Step 4: Simplify right side
    39,678.26x = 1,192,288,960.16
  5. Step 5: Solve for x
    x = 1,192,288,960.16/39,678.26
  6. Step 6: Final answer
    x = 30,048.93

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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.