Home / 39,236.72-54,147-21,331.72

Finding the Fourth Proportional to 39,236.72, 54,147 and 21,331.72

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Solution

The fourth proportional to 39,236.72, 54,147 and 21,331.72 is: 29,437.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,236.72 : 54,147 = 21,331.72 : x
  2. Step 2: Convert to fraction form
    39,236.72/54,147 = 21,331.72/x
  3. Step 3: Cross multiply
    39,236.72x = 54,147 × 21,331.72
  4. Step 4: Simplify right side
    39,236.72x = 1,155,048,642.84
  5. Step 5: Solve for x
    x = 1,155,048,642.84/39,236.72
  6. Step 6: Final answer
    x = 29,437.95

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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.