Home / 20,718.94-28,592.09-11,287.48

Finding the Fourth Proportional to 20,718.94, 28,592.09 and 11,287.48

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Solution

The fourth proportional to 20,718.94, 28,592.09 and 11,287.48 is: 15,576.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.94 : 28,592.09 = 11,287.48 : x
  2. Step 2: Convert to fraction form
    20,718.94/28,592.09 = 11,287.48/x
  3. Step 3: Cross multiply
    20,718.94x = 28,592.09 × 11,287.48
  4. Step 4: Simplify right side
    20,718.94x = 322,732,587.60
  5. Step 5: Solve for x
    x = 322,732,587.60/20,718.94
  6. Step 6: Final answer
    x = 15,576.69

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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.