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Finding the Fourth Proportional to 8,918.72, 12,307.50 and 4,939.52

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Solution

The fourth proportional to 8,918.72, 12,307.50 and 4,939.52 is: 6,816.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.72 : 12,307.50 = 4,939.52 : x
  2. Step 2: Convert to fraction form
    8,918.72/12,307.50 = 4,939.52/x
  3. Step 3: Cross multiply
    8,918.72x = 12,307.50 × 4,939.52
  4. Step 4: Simplify right side
    8,918.72x = 60,793,142.40
  5. Step 5: Solve for x
    x = 60,793,142.40/8,918.72
  6. Step 6: Final answer
    x = 6,816.35

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.