Home / 20,827.32-28,740.96-12,442.20

Finding the Fourth Proportional to 20,827.32, 28,740.96 and 12,442.20

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Solution

The fourth proportional to 20,827.32, 28,740.96 and 12,442.20 is: 17,169.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.32 : 28,740.96 = 12,442.20 : x
  2. Step 2: Convert to fraction form
    20,827.32/28,740.96 = 12,442.20/x
  3. Step 3: Cross multiply
    20,827.32x = 28,740.96 × 12,442.20
  4. Step 4: Simplify right side
    20,827.32x = 357,600,772.51
  5. Step 5: Solve for x
    x = 357,600,772.51/20,827.32
  6. Step 6: Final answer
    x = 17,169.79

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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.