Home / 12,438.02-17,166.11-7,131.80

Finding the Fourth Proportional to 12,438.02, 17,166.11 and 7,131.80

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Solution

The fourth proportional to 12,438.02, 17,166.11 and 7,131.80 is: 9,842.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.02 : 17,166.11 = 7,131.80 : x
  2. Step 2: Convert to fraction form
    12,438.02/17,166.11 = 7,131.80/x
  3. Step 3: Cross multiply
    12,438.02x = 17,166.11 × 7,131.80
  4. Step 4: Simplify right side
    12,438.02x = 122,425,263.30
  5. Step 5: Solve for x
    x = 122,425,263.30/12,438.02
  6. Step 6: Final answer
    x = 9,842.83

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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.