Home / 13,173.31-18,173.97-8,128.74

Finding the Fourth Proportional to 13,173.31, 18,173.97 and 8,128.74

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Solution

The fourth proportional to 13,173.31, 18,173.97 and 8,128.74 is: 11,214.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,173.31 : 18,173.97 = 8,128.74 : x
  2. Step 2: Convert to fraction form
    13,173.31/18,173.97 = 8,128.74/x
  3. Step 3: Cross multiply
    13,173.31x = 18,173.97 × 8,128.74
  4. Step 4: Simplify right side
    13,173.31x = 147,731,476.90
  5. Step 5: Solve for x
    x = 147,731,476.90/13,173.31
  6. Step 6: Final answer
    x = 11,214.45

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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.