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Finding the Fourth Proportional to 7,408.70, 11,113.05 and 4,643.90

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Solution

The fourth proportional to 7,408.70, 11,113.05 and 4,643.90 is: 6,965.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,408.70 : 11,113.05 = 4,643.90 : x
  2. Step 2: Convert to fraction form
    7,408.70/11,113.05 = 4,643.90/x
  3. Step 3: Cross multiply
    7,408.70x = 11,113.05 × 4,643.90
  4. Step 4: Simplify right side
    7,408.70x = 51,607,892.90
  5. Step 5: Solve for x
    x = 51,607,892.90/7,408.70
  6. Step 6: Final answer
    x = 6,965.85

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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.