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Finding the Fourth Proportional to 7,950.30, 11,916.78 and 5,178.90

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Solution

The fourth proportional to 7,950.30, 11,916.78 and 5,178.90 is: 7,762.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,950.30 : 11,916.78 = 5,178.90 : x
  2. Step 2: Convert to fraction form
    7,950.30/11,916.78 = 5,178.90/x
  3. Step 3: Cross multiply
    7,950.30x = 11,916.78 × 5,178.90
  4. Step 4: Simplify right side
    7,950.30x = 61,715,811.94
  5. Step 5: Solve for x
    x = 61,715,811.94/7,950.30
  6. Step 6: Final answer
    x = 7,762.70

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1.5x scale

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.