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Finding the Fourth Proportional to 10,891.63, 15,026.10 and 6,408.28

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Solution

The fourth proportional to 10,891.63, 15,026.10 and 6,408.28 is: 8,840.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,891.63 : 15,026.10 = 6,408.28 : x
  2. Step 2: Convert to fraction form
    10,891.63/15,026.10 = 6,408.28/x
  3. Step 3: Cross multiply
    10,891.63x = 15,026.10 × 6,408.28
  4. Step 4: Simplify right side
    10,891.63x = 96,291,456.11
  5. Step 5: Solve for x
    x = 96,291,456.11/10,891.63
  6. Step 6: Final answer
    x = 8,840.87

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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.