Home / 21,121.08-29,146.98-11,689.32

Finding the Fourth Proportional to 21,121.08, 29,146.98 and 11,689.32

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Solution

The fourth proportional to 21,121.08, 29,146.98 and 11,689.32 is: 16,131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.08 : 29,146.98 = 11,689.32 : x
  2. Step 2: Convert to fraction form
    21,121.08/29,146.98 = 11,689.32/x
  3. Step 3: Cross multiply
    21,121.08x = 29,146.98 × 11,689.32
  4. Step 4: Simplify right side
    21,121.08x = 340,708,376.25
  5. Step 5: Solve for x
    x = 340,708,376.25/21,121.08
  6. Step 6: Final answer
    x = 16,131.20

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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.