Home / 20,892.95-28,821.53-13,721.83

Finding the Fourth Proportional to 20,892.95, 28,821.53 and 13,721.83

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Solution

The fourth proportional to 20,892.95, 28,821.53 and 13,721.83 is: 18,929.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.95 : 28,821.53 = 13,721.83 : x
  2. Step 2: Convert to fraction form
    20,892.95/28,821.53 = 13,721.83/x
  3. Step 3: Cross multiply
    20,892.95x = 28,821.53 × 13,721.83
  4. Step 4: Simplify right side
    20,892.95x = 395,484,135.00
  5. Step 5: Solve for x
    x = 395,484,135.00/20,892.95
  6. Step 6: Final answer
    x = 18,929.07

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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.