Home / 20,211.12-27,905.58-15,186.96

Finding the Fourth Proportional to 20,211.12, 27,905.58 and 15,186.96

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Solution

The fourth proportional to 20,211.12, 27,905.58 and 15,186.96 is: 20,968.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.12 : 27,905.58 = 15,186.96 : x
  2. Step 2: Convert to fraction form
    20,211.12/27,905.58 = 15,186.96/x
  3. Step 3: Cross multiply
    20,211.12x = 27,905.58 × 15,186.96
  4. Step 4: Simplify right side
    20,211.12x = 423,800,927.24
  5. Step 5: Solve for x
    x = 423,800,927.24/20,211.12
  6. Step 6: Final answer
    x = 20,968.70

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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.