Home / 13,136.34-18,128.09-7,167.99

Finding the Fourth Proportional to 13,136.34, 18,128.09 and 7,167.99

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Solution

The fourth proportional to 13,136.34, 18,128.09 and 7,167.99 is: 9,891.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.34 : 18,128.09 = 7,167.99 : x
  2. Step 2: Convert to fraction form
    13,136.34/18,128.09 = 7,167.99/x
  3. Step 3: Cross multiply
    13,136.34x = 18,128.09 × 7,167.99
  4. Step 4: Simplify right side
    13,136.34x = 129,941,967.84
  5. Step 5: Solve for x
    x = 129,941,967.84/13,136.34
  6. Step 6: Final answer
    x = 9,891.79

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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.