Home / 13,356.09-18,431.37-7,387.59

Finding the Fourth Proportional to 13,356.09, 18,431.37 and 7,387.59

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Solution

The fourth proportional to 13,356.09, 18,431.37 and 7,387.59 is: 10,194.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.09 : 18,431.37 = 7,387.59 : x
  2. Step 2: Convert to fraction form
    13,356.09/18,431.37 = 7,387.59/x
  3. Step 3: Cross multiply
    13,356.09x = 18,431.37 × 7,387.59
  4. Step 4: Simplify right side
    13,356.09x = 136,163,404.70
  5. Step 5: Solve for x
    x = 136,163,404.70/13,356.09
  6. Step 6: Final answer
    x = 10,194.86

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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.