Home / 39,295.26-54,228.15-21,390.78

Finding the Fourth Proportional to 39,295.26, 54,228.15 and 21,390.78

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Solution

The fourth proportional to 39,295.26, 54,228.15 and 21,390.78 is: 29,519.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,295.26 : 54,228.15 = 21,390.78 : x
  2. Step 2: Convert to fraction form
    39,295.26/54,228.15 = 21,390.78/x
  3. Step 3: Cross multiply
    39,295.26x = 54,228.15 × 21,390.78
  4. Step 4: Simplify right side
    39,295.26x = 1,159,982,426.46
  5. Step 5: Solve for x
    x = 1,159,982,426.46/39,295.26
  6. Step 6: Final answer
    x = 29,519.65

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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.