Home / 13,137.54-18,129.65-7,169.31

Finding the Fourth Proportional to 13,137.54, 18,129.65 and 7,169.31

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Solution

The fourth proportional to 13,137.54, 18,129.65 and 7,169.31 is: 9,893.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.54 : 18,129.65 = 7,169.31 : x
  2. Step 2: Convert to fraction form
    13,137.54/18,129.65 = 7,169.31/x
  3. Step 3: Cross multiply
    13,137.54x = 18,129.65 × 7,169.31
  4. Step 4: Simplify right side
    13,137.54x = 129,977,081.04
  5. Step 5: Solve for x
    x = 129,977,081.04/13,137.54
  6. Step 6: Final answer
    x = 9,893.56

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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.