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Finding the Fourth Proportional to 8,918.60, 12,307.88 and 4,940.04

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Solution

The fourth proportional to 8,918.60, 12,307.88 and 4,940.04 is: 6,817.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.60 : 12,307.88 = 4,940.04 : x
  2. Step 2: Convert to fraction form
    8,918.60/12,307.88 = 4,940.04/x
  3. Step 3: Cross multiply
    8,918.60x = 12,307.88 × 4,940.04
  4. Step 4: Simplify right side
    8,918.60x = 60,801,419.52
  5. Step 5: Solve for x
    x = 60,801,419.52/8,918.60
  6. Step 6: Final answer
    x = 6,817.37

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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.