Home / 12,154.08-18,228.78-5,131.78

Finding the Fourth Proportional to 12,154.08, 18,228.78 and 5,131.78

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Solution

The fourth proportional to 12,154.08, 18,228.78 and 5,131.78 is: 7,696.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,154.08 : 18,228.78 = 5,131.78 : x
  2. Step 2: Convert to fraction form
    12,154.08/18,228.78 = 5,131.78/x
  3. Step 3: Cross multiply
    12,154.08x = 18,228.78 × 5,131.78
  4. Step 4: Simplify right side
    12,154.08x = 93,546,088.63
  5. Step 5: Solve for x
    x = 93,546,088.63/12,154.08
  6. Step 6: Final answer
    x = 7,696.68

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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.