Home / 13,136.94-18,128.84-7,168.86

Finding the Fourth Proportional to 13,136.94, 18,128.84 and 7,168.86

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Solution

The fourth proportional to 13,136.94, 18,128.84 and 7,168.86 is: 9,892.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.94 : 18,128.84 = 7,168.86 : x
  2. Step 2: Convert to fraction form
    13,136.94/18,128.84 = 7,168.86/x
  3. Step 3: Cross multiply
    13,136.94x = 18,128.84 × 7,168.86
  4. Step 4: Simplify right side
    13,136.94x = 129,963,080.08
  5. Step 5: Solve for x
    x = 129,963,080.08/13,136.94
  6. Step 6: Final answer
    x = 9,892.95

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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.