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Finding the Fourth Proportional to 38,910.68, 53,696.76 and 22,143.68

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Solution

The fourth proportional to 38,910.68, 53,696.76 and 22,143.68 is: 30,558.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,910.68 : 53,696.76 = 22,143.68 : x
  2. Step 2: Convert to fraction form
    38,910.68/53,696.76 = 22,143.68/x
  3. Step 3: Cross multiply
    38,910.68x = 53,696.76 × 22,143.68
  4. Step 4: Simplify right side
    38,910.68x = 1,189,043,870.48
  5. Step 5: Solve for x
    x = 1,189,043,870.48/38,910.68
  6. Step 6: Final answer
    x = 30,558.29

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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.