Home / 13,116.26-18,100.20-7,147.98

Finding the Fourth Proportional to 13,116.26, 18,100.20 and 7,147.98

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Solution

The fourth proportional to 13,116.26, 18,100.20 and 7,147.98 is: 9,864.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,116.26 : 18,100.20 = 7,147.98 : x
  2. Step 2: Convert to fraction form
    13,116.26/18,100.20 = 7,147.98/x
  3. Step 3: Cross multiply
    13,116.26x = 18,100.20 × 7,147.98
  4. Step 4: Simplify right side
    13,116.26x = 129,379,867.60
  5. Step 5: Solve for x
    x = 129,379,867.60/13,116.26
  6. Step 6: Final answer
    x = 9,864.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.