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Finding the Fourth Proportional to 12,074.76, 18,112.14 and 4,281.76

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Solution

The fourth proportional to 12,074.76, 18,112.14 and 4,281.76 is: 6,422.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,074.76 : 18,112.14 = 4,281.76 : x
  2. Step 2: Convert to fraction form
    12,074.76/18,112.14 = 4,281.76/x
  3. Step 3: Cross multiply
    12,074.76x = 18,112.14 × 4,281.76
  4. Step 4: Simplify right side
    12,074.76x = 77,551,836.57
  5. Step 5: Solve for x
    x = 77,551,836.57/12,074.76
  6. Step 6: Final answer
    x = 6,422.64

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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.