Home / 21,118.83-29,143.58-11,687.46

Finding the Fourth Proportional to 21,118.83, 29,143.58 and 11,687.46

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Solution

The fourth proportional to 21,118.83, 29,143.58 and 11,687.46 is: 16,128.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.83 : 29,143.58 = 11,687.46 : x
  2. Step 2: Convert to fraction form
    21,118.83/29,143.58 = 11,687.46/x
  3. Step 3: Cross multiply
    21,118.83x = 29,143.58 × 11,687.46
  4. Step 4: Simplify right side
    21,118.83x = 340,614,367.07
  5. Step 5: Solve for x
    x = 340,614,367.07/21,118.83
  6. Step 6: Final answer
    x = 16,128.47

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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.