Home / 13,118.31-18,102.80-7,149.83

Finding the Fourth Proportional to 13,118.31, 18,102.80 and 7,149.83

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Solution

The fourth proportional to 13,118.31, 18,102.80 and 7,149.83 is: 9,866.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.31 : 18,102.80 = 7,149.83 : x
  2. Step 2: Convert to fraction form
    13,118.31/18,102.80 = 7,149.83/x
  3. Step 3: Cross multiply
    13,118.31x = 18,102.80 × 7,149.83
  4. Step 4: Simplify right side
    13,118.31x = 129,431,816.26
  5. Step 5: Solve for x
    x = 129,431,816.26/13,118.31
  6. Step 6: Final answer
    x = 9,866.50

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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.