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Finding the Fourth Proportional to 18,644.40, 27,966.60 and 12,423.60

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Solution

The fourth proportional to 18,644.40, 27,966.60 and 12,423.60 is: 18,635.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,644.40 : 27,966.60 = 12,423.60 : x
  2. Step 2: Convert to fraction form
    18,644.40/27,966.60 = 12,423.60/x
  3. Step 3: Cross multiply
    18,644.40x = 27,966.60 × 12,423.60
  4. Step 4: Simplify right side
    18,644.40x = 347,445,851.76
  5. Step 5: Solve for x
    x = 347,445,851.76/18,644.40
  6. Step 6: Final answer
    x = 18,635.40

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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.