Home / 20,415.13-28,173.28-11,463.51

Finding the Fourth Proportional to 20,415.13, 28,173.28 and 11,463.51

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Solution

The fourth proportional to 20,415.13, 28,173.28 and 11,463.51 is: 15,819.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.13 : 28,173.28 = 11,463.51 : x
  2. Step 2: Convert to fraction form
    20,415.13/28,173.28 = 11,463.51/x
  3. Step 3: Cross multiply
    20,415.13x = 28,173.28 × 11,463.51
  4. Step 4: Simplify right side
    20,415.13x = 322,964,677.01
  5. Step 5: Solve for x
    x = 322,964,677.01/20,415.13
  6. Step 6: Final answer
    x = 15,819.87

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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.