Home / 12,612.47-18,918-3,846.70

Finding the Fourth Proportional to 12,612.47, 18,918 and 3,846.70

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Solution

The fourth proportional to 12,612.47, 18,918 and 3,846.70 is: 5,769.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.47 : 18,918 = 3,846.70 : x
  2. Step 2: Convert to fraction form
    12,612.47/18,918 = 3,846.70/x
  3. Step 3: Cross multiply
    12,612.47x = 18,918 × 3,846.70
  4. Step 4: Simplify right side
    12,612.47x = 72,771,776.01
  5. Step 5: Solve for x
    x = 72,771,776.01/12,612.47
  6. Step 6: Final answer
    x = 5,769.83

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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.