Home / 12,987.14-19,517.56-12,101.81

Finding the Fourth Proportional to 12,987.14, 19,517.56 and 12,101.81

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Solution

The fourth proportional to 12,987.14, 19,517.56 and 12,101.81 is: 18,187.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,987.14 : 19,517.56 = 12,101.81 : x
  2. Step 2: Convert to fraction form
    12,987.14/19,517.56 = 12,101.81/x
  3. Step 3: Cross multiply
    12,987.14x = 19,517.56 × 12,101.81
  4. Step 4: Simplify right side
    12,987.14x = 236,197,674.94
  5. Step 5: Solve for x
    x = 236,197,674.94/12,987.14
  6. Step 6: Final answer
    x = 18,187.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.