Home / 12,147.40-18,215.70-5,575.72

Finding the Fourth Proportional to 12,147.40, 18,215.70 and 5,575.72

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Solution

The fourth proportional to 12,147.40, 18,215.70 and 5,575.72 is: 8,361.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.40 : 18,215.70 = 5,575.72 : x
  2. Step 2: Convert to fraction form
    12,147.40/18,215.70 = 5,575.72/x
  3. Step 3: Cross multiply
    12,147.40x = 18,215.70 × 5,575.72
  4. Step 4: Simplify right side
    12,147.40x = 101,565,642.80
  5. Step 5: Solve for x
    x = 101,565,642.80/12,147.40
  6. Step 6: Final answer
    x = 8,361.10

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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.