Home / 15,840.80-21,869.41-11,829.75

Finding the Fourth Proportional to 15,840.80, 21,869.41 and 11,829.75

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Solution

The fourth proportional to 15,840.80, 21,869.41 and 11,829.75 is: 16,331.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,840.80 : 21,869.41 = 11,829.75 : x
  2. Step 2: Convert to fraction form
    15,840.80/21,869.41 = 11,829.75/x
  3. Step 3: Cross multiply
    15,840.80x = 21,869.41 × 11,829.75
  4. Step 4: Simplify right side
    15,840.80x = 258,709,652.95
  5. Step 5: Solve for x
    x = 258,709,652.95/15,840.80
  6. Step 6: Final answer
    x = 16,331.86

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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.