Home / 15,118.26-20,858.22-9,147.66

Finding the Fourth Proportional to 15,118.26, 20,858.22 and 9,147.66

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Solution

The fourth proportional to 15,118.26, 20,858.22 and 9,147.66 is: 12,620.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.26 : 20,858.22 = 9,147.66 : x
  2. Step 2: Convert to fraction form
    15,118.26/20,858.22 = 9,147.66/x
  3. Step 3: Cross multiply
    15,118.26x = 20,858.22 × 9,147.66
  4. Step 4: Simplify right side
    15,118.26x = 190,803,904.77
  5. Step 5: Solve for x
    x = 190,803,904.77/15,118.26
  6. Step 6: Final answer
    x = 12,620.76

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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.