Home / 21,208.32-31,801.61-11,218.46

Finding the Fourth Proportional to 21,208.32, 31,801.61 and 11,218.46

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Solution

The fourth proportional to 21,208.32, 31,801.61 and 11,218.46 is: 16,821.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.32 : 31,801.61 = 11,218.46 : x
  2. Step 2: Convert to fraction form
    21,208.32/31,801.61 = 11,218.46/x
  3. Step 3: Cross multiply
    21,208.32x = 31,801.61 × 11,218.46
  4. Step 4: Simplify right side
    21,208.32x = 356,765,033.63
  5. Step 5: Solve for x
    x = 356,765,033.63/21,208.32
  6. Step 6: Final answer
    x = 16,821.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.