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Finding the Fourth Proportional to 6,620.87, 9,916.17 and 3,160.55

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Solution

The fourth proportional to 6,620.87, 9,916.17 and 3,160.55 is: 4,733.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.87 : 9,916.17 = 3,160.55 : x
  2. Step 2: Convert to fraction form
    6,620.87/9,916.17 = 3,160.55/x
  3. Step 3: Cross multiply
    6,620.87x = 9,916.17 × 3,160.55
  4. Step 4: Simplify right side
    6,620.87x = 31,340,501.51
  5. Step 5: Solve for x
    x = 31,340,501.51/6,620.87
  6. Step 6: Final answer
    x = 4,733.60

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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.