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Finding the Fourth Proportional to 15,676.21, 21,633.51 and 8,603.11

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Solution

The fourth proportional to 15,676.21, 21,633.51 and 8,603.11 is: 11,872.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,676.21 : 21,633.51 = 8,603.11 : x
  2. Step 2: Convert to fraction form
    15,676.21/21,633.51 = 8,603.11/x
  3. Step 3: Cross multiply
    15,676.21x = 21,633.51 × 8,603.11
  4. Step 4: Simplify right side
    15,676.21x = 186,115,466.22
  5. Step 5: Solve for x
    x = 186,115,466.22/15,676.21
  6. Step 6: Final answer
    x = 11,872.48

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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.