Home / 20,906.70-28,849.32-12,407.36

Finding the Fourth Proportional to 20,906.70, 28,849.32 and 12,407.36

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Solution

The fourth proportional to 20,906.70, 28,849.32 and 12,407.36 is: 17,121.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.70 : 28,849.32 = 12,407.36 : x
  2. Step 2: Convert to fraction form
    20,906.70/28,849.32 = 12,407.36/x
  3. Step 3: Cross multiply
    20,906.70x = 28,849.32 × 12,407.36
  4. Step 4: Simplify right side
    20,906.70x = 357,943,899.00
  5. Step 5: Solve for x
    x = 357,943,899.00/20,906.70
  6. Step 6: Final answer
    x = 17,121.01

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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.