Home / 12,390.62-17,113.24-8,160.58

Finding the Fourth Proportional to 12,390.62, 17,113.24 and 8,160.58

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Solution

The fourth proportional to 12,390.62, 17,113.24 and 8,160.58 is: 11,270.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.62 : 17,113.24 = 8,160.58 : x
  2. Step 2: Convert to fraction form
    12,390.62/17,113.24 = 8,160.58/x
  3. Step 3: Cross multiply
    12,390.62x = 17,113.24 × 8,160.58
  4. Step 4: Simplify right side
    12,390.62x = 139,653,995.67
  5. Step 5: Solve for x
    x = 139,653,995.67/12,390.62
  6. Step 6: Final answer
    x = 11,270.95

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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.