Home / 15,842.73-21,861.05-12,620.76

Finding the Fourth Proportional to 15,842.73, 21,861.05 and 12,620.76

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Solution

The fourth proportional to 15,842.73, 21,861.05 and 12,620.76 is: 17,415.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,842.73 : 21,861.05 = 12,620.76 : x
  2. Step 2: Convert to fraction form
    15,842.73/21,861.05 = 12,620.76/x
  3. Step 3: Cross multiply
    15,842.73x = 21,861.05 × 12,620.76
  4. Step 4: Simplify right side
    15,842.73x = 275,902,920.32
  5. Step 5: Solve for x
    x = 275,902,920.32/15,842.73
  6. Step 6: Final answer
    x = 17,415.11

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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.