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Finding the Fourth Proportional to 12,243.30, 18,364.95 and 7,310.40

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Solution

The fourth proportional to 12,243.30, 18,364.95 and 7,310.40 is: 10,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,243.30 : 18,364.95 = 7,310.40 : x
  2. Step 2: Convert to fraction form
    12,243.30/18,364.95 = 7,310.40/x
  3. Step 3: Cross multiply
    12,243.30x = 18,364.95 × 7,310.40
  4. Step 4: Simplify right side
    12,243.30x = 134,255,130.48
  5. Step 5: Solve for x
    x = 134,255,130.48/12,243.30
  6. Step 6: Final answer
    x = 10,965.60

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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.