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Finding the Fourth Proportional to 9,930.88, 13,702.08 and 6,618.88

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Solution

The fourth proportional to 9,930.88, 13,702.08 and 6,618.88 is: 9,132.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,930.88 : 13,702.08 = 6,618.88 : x
  2. Step 2: Convert to fraction form
    9,930.88/13,702.08 = 6,618.88/x
  3. Step 3: Cross multiply
    9,930.88x = 13,702.08 × 6,618.88
  4. Step 4: Simplify right side
    9,930.88x = 90,692,423.27
  5. Step 5: Solve for x
    x = 90,692,423.27/9,930.88
  6. Step 6: Final answer
    x = 9,132.37

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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.