Home / 13,143.05-18,136.71-7,173.56

Finding the Fourth Proportional to 13,143.05, 18,136.71 and 7,173.56

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Solution

The fourth proportional to 13,143.05, 18,136.71 and 7,173.56 is: 9,899.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.05 : 18,136.71 = 7,173.56 : x
  2. Step 2: Convert to fraction form
    13,143.05/18,136.71 = 7,173.56/x
  3. Step 3: Cross multiply
    13,143.05x = 18,136.71 × 7,173.56
  4. Step 4: Simplify right side
    13,143.05x = 130,104,650.84
  5. Step 5: Solve for x
    x = 130,104,650.84/13,143.05
  6. Step 6: Final answer
    x = 9,899.13

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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.