Home / 21,069.95-29,078.06-12,120.26

Finding the Fourth Proportional to 21,069.95, 29,078.06 and 12,120.26

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Solution

The fourth proportional to 21,069.95, 29,078.06 and 12,120.26 is: 16,726.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.95 : 29,078.06 = 12,120.26 : x
  2. Step 2: Convert to fraction form
    21,069.95/29,078.06 = 12,120.26/x
  3. Step 3: Cross multiply
    21,069.95x = 29,078.06 × 12,120.26
  4. Step 4: Simplify right side
    21,069.95x = 352,433,441.50
  5. Step 5: Solve for x
    x = 352,433,441.50/21,069.95
  6. Step 6: Final answer
    x = 16,726.83

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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.