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Finding the Fourth Proportional to 8,980.88, 12,393 and 5,622.41

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Solution

The fourth proportional to 8,980.88, 12,393 and 5,622.41 is: 7,758.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.88 : 12,393 = 5,622.41 : x
  2. Step 2: Convert to fraction form
    8,980.88/12,393 = 5,622.41/x
  3. Step 3: Cross multiply
    8,980.88x = 12,393 × 5,622.41
  4. Step 4: Simplify right side
    8,980.88x = 69,678,558.11
  5. Step 5: Solve for x
    x = 69,678,558.11/8,980.88
  6. Step 6: Final answer
    x = 7,758.55

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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.