Home / 15,729.68-21,707.34-8,559.99

Finding the Fourth Proportional to 15,729.68, 21,707.34 and 8,559.99

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Solution

The fourth proportional to 15,729.68, 21,707.34 and 8,559.99 is: 11,812.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.68 : 21,707.34 = 8,559.99 : x
  2. Step 2: Convert to fraction form
    15,729.68/21,707.34 = 8,559.99/x
  3. Step 3: Cross multiply
    15,729.68x = 21,707.34 × 8,559.99
  4. Step 4: Simplify right side
    15,729.68x = 185,814,613.33
  5. Step 5: Solve for x
    x = 185,814,613.33/15,729.68
  6. Step 6: Final answer
    x = 11,812.99

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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.