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Finding the Fourth Proportional to 7,121.92, 9,827.52 and 4,328.32

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Solution

The fourth proportional to 7,121.92, 9,827.52 and 4,328.32 is: 5,972.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.92 : 9,827.52 = 4,328.32 : x
  2. Step 2: Convert to fraction form
    7,121.92/9,827.52 = 4,328.32/x
  3. Step 3: Cross multiply
    7,121.92x = 9,827.52 × 4,328.32
  4. Step 4: Simplify right side
    7,121.92x = 42,536,651.37
  5. Step 5: Solve for x
    x = 42,536,651.37/7,121.92
  6. Step 6: Final answer
    x = 5,972.64

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Half scale
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Double scale
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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.