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Finding the Fourth Proportional to 39,118.92, 53,984.13 and 21,213.92

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Solution

The fourth proportional to 39,118.92, 53,984.13 and 21,213.92 is: 29,275.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,118.92 : 53,984.13 = 21,213.92 : x
  2. Step 2: Convert to fraction form
    39,118.92/53,984.13 = 21,213.92/x
  3. Step 3: Cross multiply
    39,118.92x = 53,984.13 × 21,213.92
  4. Step 4: Simplify right side
    39,118.92x = 1,145,214,745.17
  5. Step 5: Solve for x
    x = 1,145,214,745.17/39,118.92
  6. Step 6: Final answer
    x = 29,275.22

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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.