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Finding the Fourth Proportional to 9,136.68, 12,633.48 and 8,988.48

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Solution

The fourth proportional to 9,136.68, 12,633.48 and 8,988.48 is: 12,428.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,136.68 : 12,633.48 = 8,988.48 : x
  2. Step 2: Convert to fraction form
    9,136.68/12,633.48 = 8,988.48/x
  3. Step 3: Cross multiply
    9,136.68x = 12,633.48 × 8,988.48
  4. Step 4: Simplify right side
    9,136.68x = 113,555,782.31
  5. Step 5: Solve for x
    x = 113,555,782.31/9,136.68
  6. Step 6: Final answer
    x = 12,428.56

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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.