Home / 12,115-18,175.20-5,541.45

Finding the Fourth Proportional to 12,115, 18,175.20 and 5,541.45

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Solution

The fourth proportional to 12,115, 18,175.20 and 5,541.45 is: 8,313.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115 : 18,175.20 = 5,541.45 : x
  2. Step 2: Convert to fraction form
    12,115/18,175.20 = 5,541.45/x
  3. Step 3: Cross multiply
    12,115x = 18,175.20 × 5,541.45
  4. Step 4: Simplify right side
    12,115x = 100,716,962.04
  5. Step 5: Solve for x
    x = 100,716,962.04/12,115
  6. Step 6: Final answer
    x = 8,313.41

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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.