Home / 13,127.76-18,119.25-8,346.78

Finding the Fourth Proportional to 13,127.76, 18,119.25 and 8,346.78

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Solution

The fourth proportional to 13,127.76, 18,119.25 and 8,346.78 is: 11,520.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.76 : 18,119.25 = 8,346.78 : x
  2. Step 2: Convert to fraction form
    13,127.76/18,119.25 = 8,346.78/x
  3. Step 3: Cross multiply
    13,127.76x = 18,119.25 × 8,346.78
  4. Step 4: Simplify right side
    13,127.76x = 151,237,393.52
  5. Step 5: Solve for x
    x = 151,237,393.52/13,127.76
  6. Step 6: Final answer
    x = 11,520.43

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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.