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Finding the Fourth Proportional to 7,900.78, 10,902.28 and 4,363.76

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Solution

The fourth proportional to 7,900.78, 10,902.28 and 4,363.76 is: 6,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,900.78 : 10,902.28 = 4,363.76 : x
  2. Step 2: Convert to fraction form
    7,900.78/10,902.28 = 4,363.76/x
  3. Step 3: Cross multiply
    7,900.78x = 10,902.28 × 4,363.76
  4. Step 4: Simplify right side
    7,900.78x = 47,574,933.37
  5. Step 5: Solve for x
    x = 47,574,933.37/7,900.78
  6. Step 6: Final answer
    x = 6,021.55

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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.