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Finding the Fourth Proportional to 15,874.67, 21,905.90 and 8,703.44

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Solution

The fourth proportional to 15,874.67, 21,905.90 and 8,703.44 is: 12,010.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,874.67 : 21,905.90 = 8,703.44 : x
  2. Step 2: Convert to fraction form
    15,874.67/21,905.90 = 8,703.44/x
  3. Step 3: Cross multiply
    15,874.67x = 21,905.90 × 8,703.44
  4. Step 4: Simplify right side
    15,874.67x = 190,656,533.25
  5. Step 5: Solve for x
    x = 190,656,533.25/15,874.67
  6. Step 6: Final answer
    x = 12,010.11

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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.