Home / 21,977.70-30,329.28-11,906.10

Finding the Fourth Proportional to 21,977.70, 30,329.28 and 11,906.10

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Solution

The fourth proportional to 21,977.70, 30,329.28 and 11,906.10 is: 16,430.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.70 : 30,329.28 = 11,906.10 : x
  2. Step 2: Convert to fraction form
    21,977.70/30,329.28 = 11,906.10/x
  3. Step 3: Cross multiply
    21,977.70x = 30,329.28 × 11,906.10
  4. Step 4: Simplify right side
    21,977.70x = 361,103,440.61
  5. Step 5: Solve for x
    x = 361,103,440.61/21,977.70
  6. Step 6: Final answer
    x = 16,430.45

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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.