Home / 20,660.16-28,511.30-12,162.30

Finding the Fourth Proportional to 20,660.16, 28,511.30 and 12,162.30

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Solution

The fourth proportional to 20,660.16, 28,511.30 and 12,162.30 is: 16,784.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.16 : 28,511.30 = 12,162.30 : x
  2. Step 2: Convert to fraction form
    20,660.16/28,511.30 = 12,162.30/x
  3. Step 3: Cross multiply
    20,660.16x = 28,511.30 × 12,162.30
  4. Step 4: Simplify right side
    20,660.16x = 346,763,084.96
  5. Step 5: Solve for x
    x = 346,763,084.96/20,660.16
  6. Step 6: Final answer
    x = 16,784.14

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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.