Home / 20,449.46-28,218.93-12,489.99

Finding the Fourth Proportional to 20,449.46, 28,218.93 and 12,489.99

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Solution

The fourth proportional to 20,449.46, 28,218.93 and 12,489.99 is: 17,235.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.46 : 28,218.93 = 12,489.99 : x
  2. Step 2: Convert to fraction form
    20,449.46/28,218.93 = 12,489.99/x
  3. Step 3: Cross multiply
    20,449.46x = 28,218.93 × 12,489.99
  4. Step 4: Simplify right side
    20,449.46x = 352,454,153.51
  5. Step 5: Solve for x
    x = 352,454,153.51/20,449.46
  6. Step 6: Final answer
    x = 17,235.38

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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.