Home / 39,578.79-54,618.83-21,429.69

Finding the Fourth Proportional to 39,578.79, 54,618.83 and 21,429.69

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Solution

The fourth proportional to 39,578.79, 54,618.83 and 21,429.69 is: 29,573.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,578.79 : 54,618.83 = 21,429.69 : x
  2. Step 2: Convert to fraction form
    39,578.79/54,618.83 = 21,429.69/x
  3. Step 3: Cross multiply
    39,578.79x = 54,618.83 × 21,429.69
  4. Step 4: Simplify right side
    39,578.79x = 1,170,464,487.91
  5. Step 5: Solve for x
    x = 1,170,464,487.91/39,578.79
  6. Step 6: Final answer
    x = 29,573.02

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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.