Home / 13,118.12-18,106.80-8,015.48

Finding the Fourth Proportional to 13,118.12, 18,106.80 and 8,015.48

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Solution

The fourth proportional to 13,118.12, 18,106.80 and 8,015.48 is: 11,063.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.12 : 18,106.80 = 8,015.48 : x
  2. Step 2: Convert to fraction form
    13,118.12/18,106.80 = 8,015.48/x
  3. Step 3: Cross multiply
    13,118.12x = 18,106.80 × 8,015.48
  4. Step 4: Simplify right side
    13,118.12x = 145,134,693.26
  5. Step 5: Solve for x
    x = 145,134,693.26/13,118.12
  6. Step 6: Final answer
    x = 11,063.68

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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.