Home / 13,128.14-18,119.77-8,347.15

Finding the Fourth Proportional to 13,128.14, 18,119.77 and 8,347.15

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Solution

The fourth proportional to 13,128.14, 18,119.77 and 8,347.15 is: 11,520.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.14 : 18,119.77 = 8,347.15 : x
  2. Step 2: Convert to fraction form
    13,128.14/18,119.77 = 8,347.15/x
  3. Step 3: Cross multiply
    13,128.14x = 18,119.77 × 8,347.15
  4. Step 4: Simplify right side
    13,128.14x = 151,248,439.94
  5. Step 5: Solve for x
    x = 151,248,439.94/13,128.14
  6. Step 6: Final answer
    x = 11,520.93

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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.