Home / 15,619.48-21,561.92-9,961.82

Finding the Fourth Proportional to 15,619.48, 21,561.92 and 9,961.82

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Solution

The fourth proportional to 15,619.48, 21,561.92 and 9,961.82 is: 13,751.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,619.48 : 21,561.92 = 9,961.82 : x
  2. Step 2: Convert to fraction form
    15,619.48/21,561.92 = 9,961.82/x
  3. Step 3: Cross multiply
    15,619.48x = 21,561.92 × 9,961.82
  4. Step 4: Simplify right side
    15,619.48x = 214,795,965.89
  5. Step 5: Solve for x
    x = 214,795,965.89/15,619.48
  6. Step 6: Final answer
    x = 13,751.80

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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.