Home / 20,415.56-28,175.10-11,463.66

Finding the Fourth Proportional to 20,415.56, 28,175.10 and 11,463.66

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Solution

The fourth proportional to 20,415.56, 28,175.10 and 11,463.66 is: 15,820.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.56 : 28,175.10 = 11,463.66 : x
  2. Step 2: Convert to fraction form
    20,415.56/28,175.10 = 11,463.66/x
  3. Step 3: Cross multiply
    20,415.56x = 28,175.10 × 11,463.66
  4. Step 4: Simplify right side
    20,415.56x = 322,989,766.87
  5. Step 5: Solve for x
    x = 322,989,766.87/20,415.56
  6. Step 6: Final answer
    x = 15,820.76

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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.