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Finding the Fourth Proportional to 8,915.94, 13,435.22 and 7,390.22

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Solution

The fourth proportional to 8,915.94, 13,435.22 and 7,390.22 is: 11,136.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.94 : 13,435.22 = 7,390.22 : x
  2. Step 2: Convert to fraction form
    8,915.94/13,435.22 = 7,390.22/x
  3. Step 3: Cross multiply
    8,915.94x = 13,435.22 × 7,390.22
  4. Step 4: Simplify right side
    8,915.94x = 99,289,182.85
  5. Step 5: Solve for x
    x = 99,289,182.85/8,915.94
  6. Step 6: Final answer
    x = 11,136.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.