Home / 22,187.40-30,618.74-12,115.72

Finding the Fourth Proportional to 22,187.40, 30,618.74 and 12,115.72

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Solution

The fourth proportional to 22,187.40, 30,618.74 and 12,115.72 is: 16,719.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,187.40 : 30,618.74 = 12,115.72 : x
  2. Step 2: Convert to fraction form
    22,187.40/30,618.74 = 12,115.72/x
  3. Step 3: Cross multiply
    22,187.40x = 30,618.74 × 12,115.72
  4. Step 4: Simplify right side
    22,187.40x = 370,968,080.59
  5. Step 5: Solve for x
    x = 370,968,080.59/22,187.40
  6. Step 6: Final answer
    x = 16,719.76

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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.