Home / 21,105.76-29,127.18-11,675.20

Finding the Fourth Proportional to 21,105.76, 29,127.18 and 11,675.20

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Solution

The fourth proportional to 21,105.76, 29,127.18 and 11,675.20 is: 16,112.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.76 : 29,127.18 = 11,675.20 : x
  2. Step 2: Convert to fraction form
    21,105.76/29,127.18 = 11,675.20/x
  3. Step 3: Cross multiply
    21,105.76x = 29,127.18 × 11,675.20
  4. Step 4: Simplify right side
    21,105.76x = 340,065,651.94
  5. Step 5: Solve for x
    x = 340,065,651.94/21,105.76
  6. Step 6: Final answer
    x = 16,112.46

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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.