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Finding the Fourth Proportional to 9,916.26, 14,881.58 and 7,991.70

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Solution

The fourth proportional to 9,916.26, 14,881.58 and 7,991.70 is: 11,993.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,916.26 : 14,881.58 = 7,991.70 : x
  2. Step 2: Convert to fraction form
    9,916.26/14,881.58 = 7,991.70/x
  3. Step 3: Cross multiply
    9,916.26x = 14,881.58 × 7,991.70
  4. Step 4: Simplify right side
    9,916.26x = 118,929,122.89
  5. Step 5: Solve for x
    x = 118,929,122.89/9,916.26
  6. Step 6: Final answer
    x = 11,993.34

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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.