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Finding the Fourth Proportional to 11,898.74, 16,386.95 and 11,640.44

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Solution

The fourth proportional to 11,898.74, 16,386.95 and 11,640.44 is: 16,031.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,898.74 : 16,386.95 = 11,640.44 : x
  2. Step 2: Convert to fraction form
    11,898.74/16,386.95 = 11,640.44/x
  3. Step 3: Cross multiply
    11,898.74x = 16,386.95 × 11,640.44
  4. Step 4: Simplify right side
    11,898.74x = 190,751,378.33
  5. Step 5: Solve for x
    x = 190,751,378.33/11,898.74
  6. Step 6: Final answer
    x = 16,031.22

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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.