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Finding the Fourth Proportional to 21,385.63, 32,083.91 and 8,901.51

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Solution

The fourth proportional to 21,385.63, 32,083.91 and 8,901.51 is: 13,354.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.63 : 32,083.91 = 8,901.51 : x
  2. Step 2: Convert to fraction form
    21,385.63/32,083.91 = 8,901.51/x
  3. Step 3: Cross multiply
    21,385.63x = 32,083.91 × 8,901.51
  4. Step 4: Simplify right side
    21,385.63x = 285,595,245.70
  5. Step 5: Solve for x
    x = 285,595,245.70/21,385.63
  6. Step 6: Final answer
    x = 13,354.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.