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Finding the Fourth Proportional to 15,676.58, 21,633 and 8,603.12

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Solution

The fourth proportional to 15,676.58, 21,633 and 8,603.12 is: 11,871.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,676.58 : 21,633 = 8,603.12 : x
  2. Step 2: Convert to fraction form
    15,676.58/21,633 = 8,603.12/x
  3. Step 3: Cross multiply
    15,676.58x = 21,633 × 8,603.12
  4. Step 4: Simplify right side
    15,676.58x = 186,111,294.96
  5. Step 5: Solve for x
    x = 186,111,294.96/15,676.58
  6. Step 6: Final answer
    x = 11,871.93

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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.