Home / 21,989.30-30,346.77-12,429.25

Finding the Fourth Proportional to 21,989.30, 30,346.77 and 12,429.25

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Solution

The fourth proportional to 21,989.30, 30,346.77 and 12,429.25 is: 17,153.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.30 : 30,346.77 = 12,429.25 : x
  2. Step 2: Convert to fraction form
    21,989.30/30,346.77 = 12,429.25/x
  3. Step 3: Cross multiply
    21,989.30x = 30,346.77 × 12,429.25
  4. Step 4: Simplify right side
    21,989.30x = 377,187,732.47
  5. Step 5: Solve for x
    x = 377,187,732.47/21,989.30
  6. Step 6: Final answer
    x = 17,153.24

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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.