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Finding the Fourth Proportional to 9,990.96, 13,783.32 and 7,008.75

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Solution

The fourth proportional to 9,990.96, 13,783.32 and 7,008.75 is: 9,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.96 : 13,783.32 = 7,008.75 : x
  2. Step 2: Convert to fraction form
    9,990.96/13,783.32 = 7,008.75/x
  3. Step 3: Cross multiply
    9,990.96x = 13,783.32 × 7,008.75
  4. Step 4: Simplify right side
    9,990.96x = 96,603,844.05
  5. Step 5: Solve for x
    x = 96,603,844.05/9,990.96
  6. Step 6: Final answer
    x = 9,669.13

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.