Home / 13,142.18-18,136.62-7,174.24

Finding the Fourth Proportional to 13,142.18, 18,136.62 and 7,174.24

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Solution

The fourth proportional to 13,142.18, 18,136.62 and 7,174.24 is: 9,900.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,142.18 : 18,136.62 = 7,174.24 : x
  2. Step 2: Convert to fraction form
    13,142.18/18,136.62 = 7,174.24/x
  3. Step 3: Cross multiply
    13,142.18x = 18,136.62 × 7,174.24
  4. Step 4: Simplify right side
    13,142.18x = 130,116,464.67
  5. Step 5: Solve for x
    x = 130,116,464.67/13,142.18
  6. Step 6: Final answer
    x = 9,900.68

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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.