Home / 20,968.02-28,915.92-13,785.21

Finding the Fourth Proportional to 20,968.02, 28,915.92 and 13,785.21

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Solution

The fourth proportional to 20,968.02, 28,915.92 and 13,785.21 is: 19,010.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.02 : 28,915.92 = 13,785.21 : x
  2. Step 2: Convert to fraction form
    20,968.02/28,915.92 = 13,785.21/x
  3. Step 3: Cross multiply
    20,968.02x = 28,915.92 × 13,785.21
  4. Step 4: Simplify right side
    20,968.02x = 398,612,029.54
  5. Step 5: Solve for x
    x = 398,612,029.54/20,968.02
  6. Step 6: Final answer
    x = 19,010.48

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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.