Home / 39,378.10-54,339.78-21,472.96

Finding the Fourth Proportional to 39,378.10, 54,339.78 and 21,472.96

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Solution

The fourth proportional to 39,378.10, 54,339.78 and 21,472.96 is: 29,631.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,378.10 : 54,339.78 = 21,472.96 : x
  2. Step 2: Convert to fraction form
    39,378.10/54,339.78 = 21,472.96/x
  3. Step 3: Cross multiply
    39,378.10x = 54,339.78 × 21,472.96
  4. Step 4: Simplify right side
    39,378.10x = 1,166,835,922.35
  5. Step 5: Solve for x
    x = 1,166,835,922.35/39,378.10
  6. Step 6: Final answer
    x = 29,631.60

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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.