Home / 19,116.40-28,660.62-12,860.86

Finding the Fourth Proportional to 19,116.40, 28,660.62 and 12,860.86

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Solution

The fourth proportional to 19,116.40, 28,660.62 and 12,860.86 is: 19,281.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,116.40 : 28,660.62 = 12,860.86 : x
  2. Step 2: Convert to fraction form
    19,116.40/28,660.62 = 12,860.86/x
  3. Step 3: Cross multiply
    19,116.40x = 28,660.62 × 12,860.86
  4. Step 4: Simplify right side
    19,116.40x = 368,600,221.33
  5. Step 5: Solve for x
    x = 368,600,221.33/19,116.40
  6. Step 6: Final answer
    x = 19,281.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.