Home / 39,138.78-54,014.23-22,143.09

Finding the Fourth Proportional to 39,138.78, 54,014.23 and 22,143.09

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Solution

The fourth proportional to 39,138.78, 54,014.23 and 22,143.09 is: 30,558.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.78 : 54,014.23 = 22,143.09 : x
  2. Step 2: Convert to fraction form
    39,138.78/54,014.23 = 22,143.09/x
  3. Step 3: Cross multiply
    39,138.78x = 54,014.23 × 22,143.09
  4. Step 4: Simplify right side
    39,138.78x = 1,196,041,656.74
  5. Step 5: Solve for x
    x = 1,196,041,656.74/39,138.78
  6. Step 6: Final answer
    x = 30,558.99

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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.