Home / 20,902.19-28,840.73-12,400.58

Finding the Fourth Proportional to 20,902.19, 28,840.73 and 12,400.58

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Solution

The fourth proportional to 20,902.19, 28,840.73 and 12,400.58 is: 17,110.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,902.19 : 28,840.73 = 12,400.58 : x
  2. Step 2: Convert to fraction form
    20,902.19/28,840.73 = 12,400.58/x
  3. Step 3: Cross multiply
    20,902.19x = 28,840.73 × 12,400.58
  4. Step 4: Simplify right side
    20,902.19x = 357,641,789.72
  5. Step 5: Solve for x
    x = 357,641,789.72/20,902.19
  6. Step 6: Final answer
    x = 17,110.26

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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.