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Finding the Fourth Proportional to 9,991.85, 14,976.11 and 7,518.72

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Solution

The fourth proportional to 9,991.85, 14,976.11 and 7,518.72 is: 11,269.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.85 : 14,976.11 = 7,518.72 : x
  2. Step 2: Convert to fraction form
    9,991.85/14,976.11 = 7,518.72/x
  3. Step 3: Cross multiply
    9,991.85x = 14,976.11 × 7,518.72
  4. Step 4: Simplify right side
    9,991.85x = 112,601,140.19
  5. Step 5: Solve for x
    x = 112,601,140.19/9,991.85
  6. Step 6: Final answer
    x = 11,269.30

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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.