Home / 15,820.80-21,825.84-9,529.56

Finding the Fourth Proportional to 15,820.80, 21,825.84 and 9,529.56

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Solution

The fourth proportional to 15,820.80, 21,825.84 and 9,529.56 is: 13,146.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,820.80 : 21,825.84 = 9,529.56 : x
  2. Step 2: Convert to fraction form
    15,820.80/21,825.84 = 9,529.56/x
  3. Step 3: Cross multiply
    15,820.80x = 21,825.84 × 9,529.56
  4. Step 4: Simplify right side
    15,820.80x = 207,990,651.83
  5. Step 5: Solve for x
    x = 207,990,651.83/15,820.80
  6. Step 6: Final answer
    x = 13,146.66

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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.