Home / 20,460.12-28,239.70-11,966.20

Finding the Fourth Proportional to 20,460.12, 28,239.70 and 11,966.20

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Solution

The fourth proportional to 20,460.12, 28,239.70 and 11,966.20 is: 16,516.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,460.12 : 28,239.70 = 11,966.20 : x
  2. Step 2: Convert to fraction form
    20,460.12/28,239.70 = 11,966.20/x
  3. Step 3: Cross multiply
    20,460.12x = 28,239.70 × 11,966.20
  4. Step 4: Simplify right side
    20,460.12x = 337,921,898.14
  5. Step 5: Solve for x
    x = 337,921,898.14/20,460.12
  6. Step 6: Final answer
    x = 16,516.12

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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.