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Finding the Fourth Proportional to 15,826.44, 21,841.44 and 9,111.90

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Solution

The fourth proportional to 15,826.44, 21,841.44 and 9,111.90 is: 12,574.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,826.44 : 21,841.44 = 9,111.90 : x
  2. Step 2: Convert to fraction form
    15,826.44/21,841.44 = 9,111.90/x
  3. Step 3: Cross multiply
    15,826.44x = 21,841.44 × 9,111.90
  4. Step 4: Simplify right side
    15,826.44x = 199,017,017.14
  5. Step 5: Solve for x
    x = 199,017,017.14/15,826.44
  6. Step 6: Final answer
    x = 12,574.97

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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.