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Finding the Fourth Proportional to 39,113.76, 53,976.03 and 21,650.55

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Solution

The fourth proportional to 39,113.76, 53,976.03 and 21,650.55 is: 29,877.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,113.76 : 53,976.03 = 21,650.55 : x
  2. Step 2: Convert to fraction form
    39,113.76/53,976.03 = 21,650.55/x
  3. Step 3: Cross multiply
    39,113.76x = 53,976.03 × 21,650.55
  4. Step 4: Simplify right side
    39,113.76x = 1,168,610,736.32
  5. Step 5: Solve for x
    x = 1,168,610,736.32/39,113.76
  6. Step 6: Final answer
    x = 29,877.23

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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.