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Finding the Fourth Proportional to 9,991.65, 14,913.38 and 8,651.46

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Solution

The fourth proportional to 9,991.65, 14,913.38 and 8,651.46 is: 12,913.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.65 : 14,913.38 = 8,651.46 : x
  2. Step 2: Convert to fraction form
    9,991.65/14,913.38 = 8,651.46/x
  3. Step 3: Cross multiply
    9,991.65x = 14,913.38 × 8,651.46
  4. Step 4: Simplify right side
    9,991.65x = 129,022,467.28
  5. Step 5: Solve for x
    x = 129,022,467.28/9,991.65
  6. Step 6: Final answer
    x = 12,913.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.