Home / 21,146.88-29,175.18-12,643.08

Finding the Fourth Proportional to 21,146.88, 29,175.18 and 12,643.08

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Solution

The fourth proportional to 21,146.88, 29,175.18 and 12,643.08 is: 17,442.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,146.88 : 29,175.18 = 12,643.08 : x
  2. Step 2: Convert to fraction form
    21,146.88/29,175.18 = 12,643.08/x
  3. Step 3: Cross multiply
    21,146.88x = 29,175.18 × 12,643.08
  4. Step 4: Simplify right side
    21,146.88x = 368,864,134.75
  5. Step 5: Solve for x
    x = 368,864,134.75/21,146.88
  6. Step 6: Final answer
    x = 17,442.96

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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.