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Finding the Fourth Proportional to 8,912.60, 13,368.72 and 3,069.24

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Solution

The fourth proportional to 8,912.60, 13,368.72 and 3,069.24 is: 4,603.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912.60 : 13,368.72 = 3,069.24 : x
  2. Step 2: Convert to fraction form
    8,912.60/13,368.72 = 3,069.24/x
  3. Step 3: Cross multiply
    8,912.60x = 13,368.72 × 3,069.24
  4. Step 4: Simplify right side
    8,912.60x = 41,031,810.17
  5. Step 5: Solve for x
    x = 41,031,810.17/8,912.60
  6. Step 6: Final answer
    x = 4,603.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.