Home / 13,150.79-18,136.87-11,116.55

Finding the Fourth Proportional to 13,150.79, 18,136.87 and 11,116.55

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Solution

The fourth proportional to 13,150.79, 18,136.87 and 11,116.55 is: 15,331.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,150.79 : 18,136.87 = 11,116.55 : x
  2. Step 2: Convert to fraction form
    13,150.79/18,136.87 = 11,116.55/x
  3. Step 3: Cross multiply
    13,150.79x = 18,136.87 × 11,116.55
  4. Step 4: Simplify right side
    13,150.79x = 201,619,359.23
  5. Step 5: Solve for x
    x = 201,619,359.23/13,150.79
  6. Step 6: Final answer
    x = 15,331.35

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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.