Home / 12,900.49-17,795.13-8,112.85

Finding the Fourth Proportional to 12,900.49, 17,795.13 and 8,112.85

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Solution

The fourth proportional to 12,900.49, 17,795.13 and 8,112.85 is: 11,190.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900.49 : 17,795.13 = 8,112.85 : x
  2. Step 2: Convert to fraction form
    12,900.49/17,795.13 = 8,112.85/x
  3. Step 3: Cross multiply
    12,900.49x = 17,795.13 × 8,112.85
  4. Step 4: Simplify right side
    12,900.49x = 144,369,220.42
  5. Step 5: Solve for x
    x = 144,369,220.42/12,900.49
  6. Step 6: Final answer
    x = 11,190.99

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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.