Home / 21,120.04-29,146.26-11,689.48

Finding the Fourth Proportional to 21,120.04, 29,146.26 and 11,689.48

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Solution

The fourth proportional to 21,120.04, 29,146.26 and 11,689.48 is: 16,131.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.04 : 29,146.26 = 11,689.48 : x
  2. Step 2: Convert to fraction form
    21,120.04/29,146.26 = 11,689.48/x
  3. Step 3: Cross multiply
    21,120.04x = 29,146.26 × 11,689.48
  4. Step 4: Simplify right side
    21,120.04x = 340,704,623.34
  5. Step 5: Solve for x
    x = 340,704,623.34/21,120.04
  6. Step 6: Final answer
    x = 16,131.82

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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.