Home / 20,403.62-28,156.28-11,451.63

Finding the Fourth Proportional to 20,403.62, 28,156.28 and 11,451.63

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Solution

The fourth proportional to 20,403.62, 28,156.28 and 11,451.63 is: 15,802.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.62 : 28,156.28 = 11,451.63 : x
  2. Step 2: Convert to fraction form
    20,403.62/28,156.28 = 11,451.63/x
  3. Step 3: Cross multiply
    20,403.62x = 28,156.28 × 11,451.63
  4. Step 4: Simplify right side
    20,403.62x = 322,435,243.48
  5. Step 5: Solve for x
    x = 322,435,243.48/20,403.62
  6. Step 6: Final answer
    x = 15,802.85

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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.