Home / 13,136.84-18,129.56-7,168.55

Finding the Fourth Proportional to 13,136.84, 18,129.56 and 7,168.55

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Solution

The fourth proportional to 13,136.84, 18,129.56 and 7,168.55 is: 9,892.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.84 : 18,129.56 = 7,168.55 : x
  2. Step 2: Convert to fraction form
    13,136.84/18,129.56 = 7,168.55/x
  3. Step 3: Cross multiply
    13,136.84x = 18,129.56 × 7,168.55
  4. Step 4: Simplify right side
    13,136.84x = 129,962,657.34
  5. Step 5: Solve for x
    x = 129,962,657.34/13,136.84
  6. Step 6: Final answer
    x = 9,892.99

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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.