Home / 39,678.92-54,756.75-21,774.23

Finding the Fourth Proportional to 39,678.92, 54,756.75 and 21,774.23

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Solution

The fourth proportional to 39,678.92, 54,756.75 and 21,774.23 is: 30,048.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,678.92 : 54,756.75 = 21,774.23 : x
  2. Step 2: Convert to fraction form
    39,678.92/54,756.75 = 21,774.23/x
  3. Step 3: Cross multiply
    39,678.92x = 54,756.75 × 21,774.23
  4. Step 4: Simplify right side
    39,678.92x = 1,192,285,794.77
  5. Step 5: Solve for x
    x = 1,192,285,794.77/39,678.92
  6. Step 6: Final answer
    x = 30,048.35

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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.