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Finding the Fourth Proportional to 25,356.87, 34,955.28 and 17,780.31

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Solution

The fourth proportional to 25,356.87, 34,955.28 and 17,780.31 is: 24,510.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,356.87 : 34,955.28 = 17,780.31 : x
  2. Step 2: Convert to fraction form
    25,356.87/34,955.28 = 17,780.31/x
  3. Step 3: Cross multiply
    25,356.87x = 34,955.28 × 17,780.31
  4. Step 4: Simplify right side
    25,356.87x = 621,515,714.54
  5. Step 5: Solve for x
    x = 621,515,714.54/25,356.87
  6. Step 6: Final answer
    x = 24,510.74

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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.