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Finding the Fourth Proportional to 13,896.66, 19,177.86 and 7,929.24

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Solution

The fourth proportional to 13,896.66, 19,177.86 and 7,929.24 is: 10,942.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,896.66 : 19,177.86 = 7,929.24 : x
  2. Step 2: Convert to fraction form
    13,896.66/19,177.86 = 7,929.24/x
  3. Step 3: Cross multiply
    13,896.66x = 19,177.86 × 7,929.24
  4. Step 4: Simplify right side
    13,896.66x = 152,065,854.63
  5. Step 5: Solve for x
    x = 152,065,854.63/13,896.66
  6. Step 6: Final answer
    x = 10,942.62

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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.