Home / 20,428.03-28,192.72-13,727.61

Finding the Fourth Proportional to 20,428.03, 28,192.72 and 13,727.61

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Solution

The fourth proportional to 20,428.03, 28,192.72 and 13,727.61 is: 18,945.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.03 : 28,192.72 = 13,727.61 : x
  2. Step 2: Convert to fraction form
    20,428.03/28,192.72 = 13,727.61/x
  3. Step 3: Cross multiply
    20,428.03x = 28,192.72 × 13,727.61
  4. Step 4: Simplify right side
    20,428.03x = 387,018,665.00
  5. Step 5: Solve for x
    x = 387,018,665.00/20,428.03
  6. Step 6: Final answer
    x = 18,945.47

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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.