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Finding the Fourth Proportional to 9,916.50, 14,863.68 and 4,990.44

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Solution

The fourth proportional to 9,916.50, 14,863.68 and 4,990.44 is: 7,480.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,916.50 : 14,863.68 = 4,990.44 : x
  2. Step 2: Convert to fraction form
    9,916.50/14,863.68 = 4,990.44/x
  3. Step 3: Cross multiply
    9,916.50x = 14,863.68 × 4,990.44
  4. Step 4: Simplify right side
    9,916.50x = 74,176,303.22
  5. Step 5: Solve for x
    x = 74,176,303.22/9,916.50
  6. Step 6: Final answer
    x = 7,480.09

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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.