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Finding the Fourth Proportional to 28,008.80, 42,013.20 and 10,477.70

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Solution

The fourth proportional to 28,008.80, 42,013.20 and 10,477.70 is: 15,716.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008.80 : 42,013.20 = 10,477.70 : x
  2. Step 2: Convert to fraction form
    28,008.80/42,013.20 = 10,477.70/x
  3. Step 3: Cross multiply
    28,008.80x = 42,013.20 × 10,477.70
  4. Step 4: Simplify right side
    28,008.80x = 440,201,705.64
  5. Step 5: Solve for x
    x = 440,201,705.64/28,008.80
  6. Step 6: Final answer
    x = 15,716.55

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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.