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Finding the Fourth Proportional to 21,702.72, 32,556.68 and 7,659.85

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Solution

The fourth proportional to 21,702.72, 32,556.68 and 7,659.85 is: 11,490.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,702.72 : 32,556.68 = 7,659.85 : x
  2. Step 2: Convert to fraction form
    21,702.72/32,556.68 = 7,659.85/x
  3. Step 3: Cross multiply
    21,702.72x = 32,556.68 × 7,659.85
  4. Step 4: Simplify right side
    21,702.72x = 249,379,223.06
  5. Step 5: Solve for x
    x = 249,379,223.06/21,702.72
  6. Step 6: Final answer
    x = 11,490.69

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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.