Home / 22,260.32-30,719.40-12,189.69

Finding the Fourth Proportional to 22,260.32, 30,719.40 and 12,189.69

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Solution

The fourth proportional to 22,260.32, 30,719.40 and 12,189.69 is: 16,821.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,260.32 : 30,719.40 = 12,189.69 : x
  2. Step 2: Convert to fraction form
    22,260.32/30,719.40 = 12,189.69/x
  3. Step 3: Cross multiply
    22,260.32x = 30,719.40 × 12,189.69
  4. Step 4: Simplify right side
    22,260.32x = 374,459,985.84
  5. Step 5: Solve for x
    x = 374,459,985.84/22,260.32
  6. Step 6: Final answer
    x = 16,821.86

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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.