Home / 13,165.28-18,178.56-8,136.80

Finding the Fourth Proportional to 13,165.28, 18,178.56 and 8,136.80

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Solution

The fourth proportional to 13,165.28, 18,178.56 and 8,136.80 is: 11,235.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,165.28 : 18,178.56 = 8,136.80 : x
  2. Step 2: Convert to fraction form
    13,165.28/18,178.56 = 8,136.80/x
  3. Step 3: Cross multiply
    13,165.28x = 18,178.56 × 8,136.80
  4. Step 4: Simplify right side
    13,165.28x = 147,915,307.01
  5. Step 5: Solve for x
    x = 147,915,307.01/13,165.28
  6. Step 6: Final answer
    x = 11,235.26

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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.