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Finding the Fourth Proportional to 7,920.64, 11,873.12 and 3,753.32

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Solution

The fourth proportional to 7,920.64, 11,873.12 and 3,753.32 is: 5,626.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.64 : 11,873.12 = 3,753.32 : x
  2. Step 2: Convert to fraction form
    7,920.64/11,873.12 = 3,753.32/x
  3. Step 3: Cross multiply
    7,920.64x = 11,873.12 × 3,753.32
  4. Step 4: Simplify right side
    7,920.64x = 44,563,618.76
  5. Step 5: Solve for x
    x = 44,563,618.76/7,920.64
  6. Step 6: Final answer
    x = 5,626.26

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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.