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Finding the Fourth Proportional to 21,950.77, 30,289.77 and 12,389.84

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Solution

The fourth proportional to 21,950.77, 30,289.77 and 12,389.84 is: 17,096.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,950.77 : 30,289.77 = 12,389.84 : x
  2. Step 2: Convert to fraction form
    21,950.77/30,289.77 = 12,389.84/x
  3. Step 3: Cross multiply
    21,950.77x = 30,289.77 × 12,389.84
  4. Step 4: Simplify right side
    21,950.77x = 375,285,403.94
  5. Step 5: Solve for x
    x = 375,285,403.94/21,950.77
  6. Step 6: Final answer
    x = 17,096.69

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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.