Home / 21,160.40-29,203.08-11,731.76

Finding the Fourth Proportional to 21,160.40, 29,203.08 and 11,731.76

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Solution

The fourth proportional to 21,160.40, 29,203.08 and 11,731.76 is: 16,190.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.40 : 29,203.08 = 11,731.76 : x
  2. Step 2: Convert to fraction form
    21,160.40/29,203.08 = 11,731.76/x
  3. Step 3: Cross multiply
    21,160.40x = 29,203.08 × 11,731.76
  4. Step 4: Simplify right side
    21,160.40x = 342,603,525.82
  5. Step 5: Solve for x
    x = 342,603,525.82/21,160.40
  6. Step 6: Final answer
    x = 16,190.79

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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.