Home / 12,491.16-18,731.40-4,168.92

Finding the Fourth Proportional to 12,491.16, 18,731.40 and 4,168.92

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Solution

The fourth proportional to 12,491.16, 18,731.40 and 4,168.92 is: 6,251.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.16 : 18,731.40 = 4,168.92 : x
  2. Step 2: Convert to fraction form
    12,491.16/18,731.40 = 4,168.92/x
  3. Step 3: Cross multiply
    12,491.16x = 18,731.40 × 4,168.92
  4. Step 4: Simplify right side
    12,491.16x = 78,089,708.09
  5. Step 5: Solve for x
    x = 78,089,708.09/12,491.16
  6. Step 6: Final answer
    x = 6,251.60

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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.