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Finding the Fourth Proportional to 21,098.70, 31,636.21 and 7,051.33

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Solution

The fourth proportional to 21,098.70, 31,636.21 and 7,051.33 is: 10,573.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,098.70 : 31,636.21 = 7,051.33 : x
  2. Step 2: Convert to fraction form
    21,098.70/31,636.21 = 7,051.33/x
  3. Step 3: Cross multiply
    21,098.70x = 31,636.21 × 7,051.33
  4. Step 4: Simplify right side
    21,098.70x = 223,077,339.03
  5. Step 5: Solve for x
    x = 223,077,339.03/21,098.70
  6. Step 6: Final answer
    x = 10,573.04

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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.