Home / 39,219.64-54,122.31-21,315.09

Finding the Fourth Proportional to 39,219.64, 54,122.31 and 21,315.09

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Solution

The fourth proportional to 39,219.64, 54,122.31 and 21,315.09 is: 29,414.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,219.64 : 54,122.31 = 21,315.09 : x
  2. Step 2: Convert to fraction form
    39,219.64/54,122.31 = 21,315.09/x
  3. Step 3: Cross multiply
    39,219.64x = 54,122.31 × 21,315.09
  4. Step 4: Simplify right side
    39,219.64x = 1,153,622,111.62
  5. Step 5: Solve for x
    x = 1,153,622,111.62/39,219.64
  6. Step 6: Final answer
    x = 29,414.40

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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.