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Finding the Fourth Proportional to 26,970.30, 40,455.45 and 17,639.10

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Solution

The fourth proportional to 26,970.30, 40,455.45 and 17,639.10 is: 26,458.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,970.30 : 40,455.45 = 17,639.10 : x
  2. Step 2: Convert to fraction form
    26,970.30/40,455.45 = 17,639.10/x
  3. Step 3: Cross multiply
    26,970.30x = 40,455.45 × 17,639.10
  4. Step 4: Simplify right side
    26,970.30x = 713,597,728.10
  5. Step 5: Solve for x
    x = 713,597,728.10/26,970.30
  6. Step 6: Final answer
    x = 26,458.65

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.