Home / 13,136.28-18,128.52-7,168.28

Finding the Fourth Proportional to 13,136.28, 18,128.52 and 7,168.28

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Solution

The fourth proportional to 13,136.28, 18,128.52 and 7,168.28 is: 9,892.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.28 : 18,128.52 = 7,168.28 : x
  2. Step 2: Convert to fraction form
    13,136.28/18,128.52 = 7,168.28/x
  3. Step 3: Cross multiply
    13,136.28x = 18,128.52 × 7,168.28
  4. Step 4: Simplify right side
    13,136.28x = 129,950,307.35
  5. Step 5: Solve for x
    x = 129,950,307.35/13,136.28
  6. Step 6: Final answer
    x = 9,892.47

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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.