Home / 21,342.67-29,453.15-12,390.55

Finding the Fourth Proportional to 21,342.67, 29,453.15 and 12,390.55

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Solution

The fourth proportional to 21,342.67, 29,453.15 and 12,390.55 is: 17,099.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.67 : 29,453.15 = 12,390.55 : x
  2. Step 2: Convert to fraction form
    21,342.67/29,453.15 = 12,390.55/x
  3. Step 3: Cross multiply
    21,342.67x = 29,453.15 × 12,390.55
  4. Step 4: Simplify right side
    21,342.67x = 364,940,727.73
  5. Step 5: Solve for x
    x = 364,940,727.73/21,342.67
  6. Step 6: Final answer
    x = 17,099.11

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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.