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Finding the Fourth Proportional to 10,500.78, 15,755.00 and 4,881.05

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Solution

The fourth proportional to 10,500.78, 15,755.00 and 4,881.05 is: 7,323.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,500.78 : 15,755.00 = 4,881.05 : x
  2. Step 2: Convert to fraction form
    10,500.78/15,755.00 = 4,881.05/x
  3. Step 3: Cross multiply
    10,500.78x = 15,755.00 × 4,881.05
  4. Step 4: Simplify right side
    10,500.78x = 76,900,839.57
  5. Step 5: Solve for x
    x = 76,900,839.57/10,500.78
  6. Step 6: Final answer
    x = 7,323.35

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Why These Related Problems?

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