Home / 12,391.75-18,579.72-5,272.16

Finding the Fourth Proportional to 12,391.75, 18,579.72 and 5,272.16

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Solution

The fourth proportional to 12,391.75, 18,579.72 and 5,272.16 is: 7,904.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.75 : 18,579.72 = 5,272.16 : x
  2. Step 2: Convert to fraction form
    12,391.75/18,579.72 = 5,272.16/x
  3. Step 3: Cross multiply
    12,391.75x = 18,579.72 × 5,272.16
  4. Step 4: Simplify right side
    12,391.75x = 97,955,256.60
  5. Step 5: Solve for x
    x = 97,955,256.60/12,391.75
  6. Step 6: Final answer
    x = 7,904.88

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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.