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Finding the Fourth Proportional to 9,991.80, 14,996.94 and 9,389.02

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Solution

The fourth proportional to 9,991.80, 14,996.94 and 9,389.02 is: 14,092.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.80 : 14,996.94 = 9,389.02 : x
  2. Step 2: Convert to fraction form
    9,991.80/14,996.94 = 9,389.02/x
  3. Step 3: Cross multiply
    9,991.80x = 14,996.94 × 9,389.02
  4. Step 4: Simplify right side
    9,991.80x = 140,806,569.60
  5. Step 5: Solve for x
    x = 140,806,569.60/9,991.80
  6. Step 6: Final answer
    x = 14,092.21

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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.