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Finding the Fourth Proportional to 11,349.76, 15,656.28 and 6,811.28

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Solution

The fourth proportional to 11,349.76, 15,656.28 and 6,811.28 is: 9,395.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,349.76 : 15,656.28 = 6,811.28 : x
  2. Step 2: Convert to fraction form
    11,349.76/15,656.28 = 6,811.28/x
  3. Step 3: Cross multiply
    11,349.76x = 15,656.28 × 6,811.28
  4. Step 4: Simplify right side
    11,349.76x = 106,639,228.56
  5. Step 5: Solve for x
    x = 106,639,228.56/11,349.76
  6. Step 6: Final answer
    x = 9,395.73

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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.