Home / 15,729.56-21,706.88-9,015.59

Finding the Fourth Proportional to 15,729.56, 21,706.88 and 9,015.59

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Solution

The fourth proportional to 15,729.56, 21,706.88 and 9,015.59 is: 12,441.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.56 : 21,706.88 = 9,015.59 : x
  2. Step 2: Convert to fraction form
    15,729.56/21,706.88 = 9,015.59/x
  3. Step 3: Cross multiply
    15,729.56x = 21,706.88 × 9,015.59
  4. Step 4: Simplify right side
    15,729.56x = 195,700,176.65
  5. Step 5: Solve for x
    x = 195,700,176.65/15,729.56
  6. Step 6: Final answer
    x = 12,441.56

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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.