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Finding the Fourth Proportional to 9,240.90, 13,861.35 and 8,220.30

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Solution

The fourth proportional to 9,240.90, 13,861.35 and 8,220.30 is: 12,330.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,240.90 : 13,861.35 = 8,220.30 : x
  2. Step 2: Convert to fraction form
    9,240.90/13,861.35 = 8,220.30/x
  3. Step 3: Cross multiply
    9,240.90x = 13,861.35 × 8,220.30
  4. Step 4: Simplify right side
    9,240.90x = 113,944,455.41
  5. Step 5: Solve for x
    x = 113,944,455.41/9,240.90
  6. Step 6: Final answer
    x = 12,330.45

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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.