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Finding the Fourth Proportional to 19,489.66, 26,896.02 and 11,531.68

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Solution

The fourth proportional to 19,489.66, 26,896.02 and 11,531.68 is: 15,913.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,489.66 : 26,896.02 = 11,531.68 : x
  2. Step 2: Convert to fraction form
    19,489.66/26,896.02 = 11,531.68/x
  3. Step 3: Cross multiply
    19,489.66x = 26,896.02 × 11,531.68
  4. Step 4: Simplify right side
    19,489.66x = 310,156,295.91
  5. Step 5: Solve for x
    x = 310,156,295.91/19,489.66
  6. Step 6: Final answer
    x = 15,913.89

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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.