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Finding the Fourth Proportional to 7,328.00, 10,991.90 and 1,781.32

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Solution

The fourth proportional to 7,328.00, 10,991.90 and 1,781.32 is: 2,671.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,328.00 : 10,991.90 = 1,781.32 : x
  2. Step 2: Convert to fraction form
    7,328.00/10,991.90 = 1,781.32/x
  3. Step 3: Cross multiply
    7,328.00x = 10,991.90 × 1,781.32
  4. Step 4: Simplify right side
    7,328.00x = 19,580,123.62
  5. Step 5: Solve for x
    x = 19,580,123.62/7,328.00
  6. Step 6: Final answer
    x = 2,671.96

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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.