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Finding the Fourth Proportional to 21,051.50, 29,051.07 and 11,620.07

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Solution

The fourth proportional to 21,051.50, 29,051.07 and 11,620.07 is: 16,035.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.50 : 29,051.07 = 11,620.07 : x
  2. Step 2: Convert to fraction form
    21,051.50/29,051.07 = 11,620.07/x
  3. Step 3: Cross multiply
    21,051.50x = 29,051.07 × 11,620.07
  4. Step 4: Simplify right side
    21,051.50x = 337,575,350.77
  5. Step 5: Solve for x
    x = 337,575,350.77/21,051.50
  6. Step 6: Final answer
    x = 16,035.69

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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.