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Finding the Fourth Proportional to 11,353.99, 15,657.63 and 8,660.42

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Solution

The fourth proportional to 11,353.99, 15,657.63 and 8,660.42 is: 11,943.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,353.99 : 15,657.63 = 8,660.42 : x
  2. Step 2: Convert to fraction form
    11,353.99/15,657.63 = 8,660.42/x
  3. Step 3: Cross multiply
    11,353.99x = 15,657.63 × 8,660.42
  4. Step 4: Simplify right side
    11,353.99x = 135,601,642.58
  5. Step 5: Solve for x
    x = 135,601,642.58/11,353.99
  6. Step 6: Final answer
    x = 11,943.09

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Double scale
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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.