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Finding the Fourth Proportional to 11,393.55, 15,723.05 and 6,357.78

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Solution

The fourth proportional to 11,393.55, 15,723.05 and 6,357.78 is: 8,773.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,393.55 : 15,723.05 = 6,357.78 : x
  2. Step 2: Convert to fraction form
    11,393.55/15,723.05 = 6,357.78/x
  3. Step 3: Cross multiply
    11,393.55x = 15,723.05 × 6,357.78
  4. Step 4: Simplify right side
    11,393.55x = 99,963,692.83
  5. Step 5: Solve for x
    x = 99,963,692.83/11,393.55
  6. Step 6: Final answer
    x = 8,773.71

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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.