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Finding the Fourth Proportional to 9,789.78, 14,702.64 and 9,393.48

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Solution

The fourth proportional to 9,789.78, 14,702.64 and 9,393.48 is: 14,107.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,789.78 : 14,702.64 = 9,393.48 : x
  2. Step 2: Convert to fraction form
    9,789.78/14,702.64 = 9,393.48/x
  3. Step 3: Cross multiply
    9,789.78x = 14,702.64 × 9,393.48
  4. Step 4: Simplify right side
    9,789.78x = 138,108,954.79
  5. Step 5: Solve for x
    x = 138,108,954.79/9,789.78
  6. Step 6: Final answer
    x = 14,107.46

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1.5x scale

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.