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Finding the Fourth Proportional to 11,490.66, 15,868.71 and 10,253.79

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Solution

The fourth proportional to 11,490.66, 15,868.71 and 10,253.79 is: 14,160.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,490.66 : 15,868.71 = 10,253.79 : x
  2. Step 2: Convert to fraction form
    11,490.66/15,868.71 = 10,253.79/x
  3. Step 3: Cross multiply
    11,490.66x = 15,868.71 × 10,253.79
  4. Step 4: Simplify right side
    11,490.66x = 162,714,419.91
  5. Step 5: Solve for x
    x = 162,714,419.91/11,490.66
  6. Step 6: Final answer
    x = 14,160.58

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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.