Home / 39,815.64-54,943.52-21,912.32

Finding the Fourth Proportional to 39,815.64, 54,943.52 and 21,912.32

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Solution

The fourth proportional to 39,815.64, 54,943.52 and 21,912.32 is: 30,237.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,815.64 : 54,943.52 = 21,912.32 : x
  2. Step 2: Convert to fraction form
    39,815.64/54,943.52 = 21,912.32/x
  3. Step 3: Cross multiply
    39,815.64x = 54,943.52 × 21,912.32
  4. Step 4: Simplify right side
    39,815.64x = 1,203,939,992.17
  5. Step 5: Solve for x
    x = 1,203,939,992.17/39,815.64
  6. Step 6: Final answer
    x = 30,237.87

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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.