Home / 15,729.94-21,707.39-8,559.92

Finding the Fourth Proportional to 15,729.94, 21,707.39 and 8,559.92

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Solution

The fourth proportional to 15,729.94, 21,707.39 and 8,559.92 is: 11,812.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.94 : 21,707.39 = 8,559.92 : x
  2. Step 2: Convert to fraction form
    15,729.94/21,707.39 = 8,559.92/x
  3. Step 3: Cross multiply
    15,729.94x = 21,707.39 × 8,559.92
  4. Step 4: Simplify right side
    15,729.94x = 185,813,597.48
  5. Step 5: Solve for x
    x = 185,813,597.48/15,729.94
  6. Step 6: Final answer
    x = 11,812.74

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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.