Home / 13,136.22-18,128.31-7,167.98

Finding the Fourth Proportional to 13,136.22, 18,128.31 and 7,167.98

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Solution

The fourth proportional to 13,136.22, 18,128.31 and 7,167.98 is: 9,891.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.22 : 18,128.31 = 7,167.98 : x
  2. Step 2: Convert to fraction form
    13,136.22/18,128.31 = 7,167.98/x
  3. Step 3: Cross multiply
    13,136.22x = 18,128.31 × 7,167.98
  4. Step 4: Simplify right side
    13,136.22x = 129,943,327.67
  5. Step 5: Solve for x
    x = 129,943,327.67/13,136.22
  6. Step 6: Final answer
    x = 9,891.99

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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.