Home / 11,447.81-17,147.20-8,643.59

Finding the Fourth Proportional to 11,447.81, 17,147.20 and 8,643.59

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Solution

The fourth proportional to 11,447.81, 17,147.20 and 8,643.59 is: 12,946.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,447.81 : 17,147.20 = 8,643.59 : x
  2. Step 2: Convert to fraction form
    11,447.81/17,147.20 = 8,643.59/x
  3. Step 3: Cross multiply
    11,447.81x = 17,147.20 × 8,643.59
  4. Step 4: Simplify right side
    11,447.81x = 148,213,366.45
  5. Step 5: Solve for x
    x = 148,213,366.45/11,447.81
  6. Step 6: Final answer
    x = 12,946.88

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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.