Home / 21,309.73-29,407.56-11,878.90

Finding the Fourth Proportional to 21,309.73, 29,407.56 and 11,878.90

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Solution

The fourth proportional to 21,309.73, 29,407.56 and 11,878.90 is: 16,392.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.73 : 29,407.56 = 11,878.90 : x
  2. Step 2: Convert to fraction form
    21,309.73/29,407.56 = 11,878.90/x
  3. Step 3: Cross multiply
    21,309.73x = 29,407.56 × 11,878.90
  4. Step 4: Simplify right side
    21,309.73x = 349,329,464.48
  5. Step 5: Solve for x
    x = 349,329,464.48/21,309.73
  6. Step 6: Final answer
    x = 16,392.96

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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.