Home / 20,617.93-28,451.01-12,120.32

Finding the Fourth Proportional to 20,617.93, 28,451.01 and 12,120.32

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Solution

The fourth proportional to 20,617.93, 28,451.01 and 12,120.32 is: 16,725.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.93 : 28,451.01 = 12,120.32 : x
  2. Step 2: Convert to fraction form
    20,617.93/28,451.01 = 12,120.32/x
  3. Step 3: Cross multiply
    20,617.93x = 28,451.01 × 12,120.32
  4. Step 4: Simplify right side
    20,617.93x = 344,835,345.52
  5. Step 5: Solve for x
    x = 344,835,345.52/20,617.93
  6. Step 6: Final answer
    x = 16,725.02

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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.