Home / 15,811.44-21,821.15-8,739.23

Finding the Fourth Proportional to 15,811.44, 21,821.15 and 8,739.23

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Solution

The fourth proportional to 15,811.44, 21,821.15 and 8,739.23 is: 12,060.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.44 : 21,821.15 = 8,739.23 : x
  2. Step 2: Convert to fraction form
    15,811.44/21,821.15 = 8,739.23/x
  3. Step 3: Cross multiply
    15,811.44x = 21,821.15 × 8,739.23
  4. Step 4: Simplify right side
    15,811.44x = 190,699,961.46
  5. Step 5: Solve for x
    x = 190,699,961.46/15,811.44
  6. Step 6: Final answer
    x = 12,060.89

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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.