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Finding the Fourth Proportional to 7,155.40, 10,728.10 and 4,232.20

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Solution

The fourth proportional to 7,155.40, 10,728.10 and 4,232.20 is: 6,345.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.40 : 10,728.10 = 4,232.20 : x
  2. Step 2: Convert to fraction form
    7,155.40/10,728.10 = 4,232.20/x
  3. Step 3: Cross multiply
    7,155.40x = 10,728.10 × 4,232.20
  4. Step 4: Simplify right side
    7,155.40x = 45,403,464.82
  5. Step 5: Solve for x
    x = 45,403,464.82/7,155.40
  6. Step 6: Final answer
    x = 6,345.34

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.