Home / 13,136.48-18,128.74-7,472.04

Finding the Fourth Proportional to 13,136.48, 18,128.74 and 7,472.04

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Solution

The fourth proportional to 13,136.48, 18,128.74 and 7,472.04 is: 10,311.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.48 : 18,128.74 = 7,472.04 : x
  2. Step 2: Convert to fraction form
    13,136.48/18,128.74 = 7,472.04/x
  3. Step 3: Cross multiply
    13,136.48x = 18,128.74 × 7,472.04
  4. Step 4: Simplify right side
    13,136.48x = 135,458,670.43
  5. Step 5: Solve for x
    x = 135,458,670.43/13,136.48
  6. Step 6: Final answer
    x = 10,311.64

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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.