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Finding the Fourth Proportional to 11,393.69, 15,721.90 and 6,358.19

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Solution

The fourth proportional to 11,393.69, 15,721.90 and 6,358.19 is: 8,773.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,393.69 : 15,721.90 = 6,358.19 : x
  2. Step 2: Convert to fraction form
    11,393.69/15,721.90 = 6,358.19/x
  3. Step 3: Cross multiply
    11,393.69x = 15,721.90 × 6,358.19
  4. Step 4: Simplify right side
    11,393.69x = 99,962,732.86
  5. Step 5: Solve for x
    x = 99,962,732.86/11,393.69
  6. Step 6: Final answer
    x = 8,773.52

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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.