Home / 21,405.93-29,533.57-12,451.78

Finding the Fourth Proportional to 21,405.93, 29,533.57 and 12,451.78

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Solution

The fourth proportional to 21,405.93, 29,533.57 and 12,451.78 is: 17,179.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.93 : 29,533.57 = 12,451.78 : x
  2. Step 2: Convert to fraction form
    21,405.93/29,533.57 = 12,451.78/x
  3. Step 3: Cross multiply
    21,405.93x = 29,533.57 × 12,451.78
  4. Step 4: Simplify right side
    21,405.93x = 367,745,516.25
  5. Step 5: Solve for x
    x = 367,745,516.25/21,405.93
  6. Step 6: Final answer
    x = 17,179.61

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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.