Home / 20,906.60-28,864.62-12,957.26

Finding the Fourth Proportional to 20,906.60, 28,864.62 and 12,957.26

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Solution

The fourth proportional to 20,906.60, 28,864.62 and 12,957.26 is: 17,889.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.60 : 28,864.62 = 12,957.26 : x
  2. Step 2: Convert to fraction form
    20,906.60/28,864.62 = 12,957.26/x
  3. Step 3: Cross multiply
    20,906.60x = 28,864.62 × 12,957.26
  4. Step 4: Simplify right side
    20,906.60x = 374,006,386.14
  5. Step 5: Solve for x
    x = 374,006,386.14/20,906.60
  6. Step 6: Final answer
    x = 17,889.39

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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.