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Finding the Fourth Proportional to 21,010.99, 28,994.43 and 11,450.68

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Solution

The fourth proportional to 21,010.99, 28,994.43 and 11,450.68 is: 15,801.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.99 : 28,994.43 = 11,450.68 : x
  2. Step 2: Convert to fraction form
    21,010.99/28,994.43 = 11,450.68/x
  3. Step 3: Cross multiply
    21,010.99x = 28,994.43 × 11,450.68
  4. Step 4: Simplify right side
    21,010.99x = 332,005,939.71
  5. Step 5: Solve for x
    x = 332,005,939.71/21,010.99
  6. Step 6: Final answer
    x = 15,801.54

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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.