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Finding the Fourth Proportional to 11,153.88, 15,365.88 and 7,790.76

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Solution

The fourth proportional to 11,153.88, 15,365.88 and 7,790.76 is: 10,732.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,153.88 : 15,365.88 = 7,790.76 : x
  2. Step 2: Convert to fraction form
    11,153.88/15,365.88 = 7,790.76/x
  3. Step 3: Cross multiply
    11,153.88x = 15,365.88 × 7,790.76
  4. Step 4: Simplify right side
    11,153.88x = 119,711,883.27
  5. Step 5: Solve for x
    x = 119,711,883.27/11,153.88
  6. Step 6: Final answer
    x = 10,732.76

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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.