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Finding the Fourth Proportional to 6,643.52, 9,919.12 and 5,998.40

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Solution

The fourth proportional to 6,643.52, 9,919.12 and 5,998.40 is: 8,955.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643.52 : 9,919.12 = 5,998.40 : x
  2. Step 2: Convert to fraction form
    6,643.52/9,919.12 = 5,998.40/x
  3. Step 3: Cross multiply
    6,643.52x = 9,919.12 × 5,998.40
  4. Step 4: Simplify right side
    6,643.52x = 59,498,849.41
  5. Step 5: Solve for x
    x = 59,498,849.41/6,643.52
  6. Step 6: Final answer
    x = 8,955.92

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