Home / 13,118.31-18,103.64-7,150.36

Finding the Fourth Proportional to 13,118.31, 18,103.64 and 7,150.36

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Solution

The fourth proportional to 13,118.31, 18,103.64 and 7,150.36 is: 9,867.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.31 : 18,103.64 = 7,150.36 : x
  2. Step 2: Convert to fraction form
    13,118.31/18,103.64 = 7,150.36/x
  3. Step 3: Cross multiply
    13,118.31x = 18,103.64 × 7,150.36
  4. Step 4: Simplify right side
    13,118.31x = 129,447,543.31
  5. Step 5: Solve for x
    x = 129,447,543.31/13,118.31
  6. Step 6: Final answer
    x = 9,867.70

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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.