Home / 12,619.56-17,415.10-8,151.60

Finding the Fourth Proportional to 12,619.56, 17,415.10 and 8,151.60

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Solution

The fourth proportional to 12,619.56, 17,415.10 and 8,151.60 is: 11,249.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.56 : 17,415.10 = 8,151.60 : x
  2. Step 2: Convert to fraction form
    12,619.56/17,415.10 = 8,151.60/x
  3. Step 3: Cross multiply
    12,619.56x = 17,415.10 × 8,151.60
  4. Step 4: Simplify right side
    12,619.56x = 141,960,929.16
  5. Step 5: Solve for x
    x = 141,960,929.16/12,619.56
  6. Step 6: Final answer
    x = 11,249.28

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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.