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Finding the Fourth Proportional to 12,343.60, 18,515.40 and 11,031.40

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Solution

The fourth proportional to 12,343.60, 18,515.40 and 11,031.40 is: 16,547.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,343.60 : 18,515.40 = 11,031.40 : x
  2. Step 2: Convert to fraction form
    12,343.60/18,515.40 = 11,031.40/x
  3. Step 3: Cross multiply
    12,343.60x = 18,515.40 × 11,031.40
  4. Step 4: Simplify right side
    12,343.60x = 204,250,783.56
  5. Step 5: Solve for x
    x = 204,250,783.56/12,343.60
  6. Step 6: Final answer
    x = 16,547.10

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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.