Home / 20,734.23-28,612.80-12,665.10

Finding the Fourth Proportional to 20,734.23, 28,612.80 and 12,665.10

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Solution

The fourth proportional to 20,734.23, 28,612.80 and 12,665.10 is: 17,477.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,734.23 : 28,612.80 = 12,665.10 : x
  2. Step 2: Convert to fraction form
    20,734.23/28,612.80 = 12,665.10/x
  3. Step 3: Cross multiply
    20,734.23x = 28,612.80 × 12,665.10
  4. Step 4: Simplify right side
    20,734.23x = 362,383,973.28
  5. Step 5: Solve for x
    x = 362,383,973.28/20,734.23
  6. Step 6: Final answer
    x = 17,477.57

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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.