Home / 20,877.33-28,816.25-12,915.03

Finding the Fourth Proportional to 20,877.33, 28,816.25 and 12,915.03

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Solution

The fourth proportional to 20,877.33, 28,816.25 and 12,915.03 is: 17,826.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.33 : 28,816.25 = 12,915.03 : x
  2. Step 2: Convert to fraction form
    20,877.33/28,816.25 = 12,915.03/x
  3. Step 3: Cross multiply
    20,877.33x = 28,816.25 × 12,915.03
  4. Step 4: Simplify right side
    20,877.33x = 372,162,668.66
  5. Step 5: Solve for x
    x = 372,162,668.66/20,877.33
  6. Step 6: Final answer
    x = 17,826.16

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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.