Home / 20,812.86-28,727.09-12,850.51

Finding the Fourth Proportional to 20,812.86, 28,727.09 and 12,850.51

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Solution

The fourth proportional to 20,812.86, 28,727.09 and 12,850.51 is: 17,737.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.86 : 28,727.09 = 12,850.51 : x
  2. Step 2: Convert to fraction form
    20,812.86/28,727.09 = 12,850.51/x
  3. Step 3: Cross multiply
    20,812.86x = 28,727.09 × 12,850.51
  4. Step 4: Simplify right side
    20,812.86x = 369,157,757.32
  5. Step 5: Solve for x
    x = 369,157,757.32/20,812.86
  6. Step 6: Final answer
    x = 17,737.00

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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.