Home / 15,781.65-21,777.67-8,708.12

Finding the Fourth Proportional to 15,781.65, 21,777.67 and 8,708.12

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Solution

The fourth proportional to 15,781.65, 21,777.67 and 8,708.12 is: 12,016.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.65 : 21,777.67 = 8,708.12 : x
  2. Step 2: Convert to fraction form
    15,781.65/21,777.67 = 8,708.12/x
  3. Step 3: Cross multiply
    15,781.65x = 21,777.67 × 8,708.12
  4. Step 4: Simplify right side
    15,781.65x = 189,642,563.68
  5. Step 5: Solve for x
    x = 189,642,563.68/15,781.65
  6. Step 6: Final answer
    x = 12,016.65

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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.