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Finding the Fourth Proportional to 38,129.58, 52,617.47 and 21,135.40

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Solution

The fourth proportional to 38,129.58, 52,617.47 and 21,135.40 is: 29,166.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,129.58 : 52,617.47 = 21,135.40 : x
  2. Step 2: Convert to fraction form
    38,129.58/52,617.47 = 21,135.40/x
  3. Step 3: Cross multiply
    38,129.58x = 52,617.47 × 21,135.40
  4. Step 4: Simplify right side
    38,129.58x = 1,112,091,275.44
  5. Step 5: Solve for x
    x = 1,112,091,275.44/38,129.58
  6. Step 6: Final answer
    x = 29,166.10

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.