Home / 28,859.12-39,825.32-15,611.12

Finding the Fourth Proportional to 28,859.12, 39,825.32 and 15,611.12

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Solution

The fourth proportional to 28,859.12, 39,825.32 and 15,611.12 is: 21,543.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,859.12 : 39,825.32 = 15,611.12 : x
  2. Step 2: Convert to fraction form
    28,859.12/39,825.32 = 15,611.12/x
  3. Step 3: Cross multiply
    28,859.12x = 39,825.32 × 15,611.12
  4. Step 4: Simplify right side
    28,859.12x = 621,717,849.56
  5. Step 5: Solve for x
    x = 621,717,849.56/28,859.12
  6. Step 6: Final answer
    x = 21,543.20

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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.