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Finding the Fourth Proportional to 15,818.36, 21,829.77 and 8,745.23

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Solution

The fourth proportional to 15,818.36, 21,829.77 and 8,745.23 is: 12,068.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,818.36 : 21,829.77 = 8,745.23 : x
  2. Step 2: Convert to fraction form
    15,818.36/21,829.77 = 8,745.23/x
  3. Step 3: Cross multiply
    15,818.36x = 21,829.77 × 8,745.23
  4. Step 4: Simplify right side
    15,818.36x = 190,906,414.07
  5. Step 5: Solve for x
    x = 190,906,414.07/15,818.36
  6. Step 6: Final answer
    x = 12,068.66

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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.