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Finding the Fourth Proportional to 7,192.94, 9,928.12 and 6,445.62

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Solution

The fourth proportional to 7,192.94, 9,928.12 and 6,445.62 is: 8,896.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,192.94 : 9,928.12 = 6,445.62 : x
  2. Step 2: Convert to fraction form
    7,192.94/9,928.12 = 6,445.62/x
  3. Step 3: Cross multiply
    7,192.94x = 9,928.12 × 6,445.62
  4. Step 4: Simplify right side
    7,192.94x = 63,992,888.83
  5. Step 5: Solve for x
    x = 63,992,888.83/7,192.94
  6. Step 6: Final answer
    x = 8,896.62

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Half scale
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Double scale
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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.