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Finding the Fourth Proportional to 15,793.41, 21,793.75 and 8,720.29

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Solution

The fourth proportional to 15,793.41, 21,793.75 and 8,720.29 is: 12,033.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,793.41 : 21,793.75 = 8,720.29 : x
  2. Step 2: Convert to fraction form
    15,793.41/21,793.75 = 8,720.29/x
  3. Step 3: Cross multiply
    15,793.41x = 21,793.75 × 8,720.29
  4. Step 4: Simplify right side
    15,793.41x = 190,047,820.19
  5. Step 5: Solve for x
    x = 190,047,820.19/15,793.41
  6. Step 6: Final answer
    x = 12,033.36

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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.