Home / 20,584.61-28,406.78-11,153.17

Finding the Fourth Proportional to 20,584.61, 28,406.78 and 11,153.17

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Solution

The fourth proportional to 20,584.61, 28,406.78 and 11,153.17 is: 15,391.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,584.61 : 28,406.78 = 11,153.17 : x
  2. Step 2: Convert to fraction form
    20,584.61/28,406.78 = 11,153.17/x
  3. Step 3: Cross multiply
    20,584.61x = 28,406.78 × 11,153.17
  4. Step 4: Simplify right side
    20,584.61x = 316,825,618.61
  5. Step 5: Solve for x
    x = 316,825,618.61/20,584.61
  6. Step 6: Final answer
    x = 15,391.38

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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.