Home / 21,638.06-29,860.62-12,685.70

Finding the Fourth Proportional to 21,638.06, 29,860.62 and 12,685.70

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Solution

The fourth proportional to 21,638.06, 29,860.62 and 12,685.70 is: 17,506.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,638.06 : 29,860.62 = 12,685.70 : x
  2. Step 2: Convert to fraction form
    21,638.06/29,860.62 = 12,685.70/x
  3. Step 3: Cross multiply
    21,638.06x = 29,860.62 × 12,685.70
  4. Step 4: Simplify right side
    21,638.06x = 378,802,867.13
  5. Step 5: Solve for x
    x = 378,802,867.13/21,638.06
  6. Step 6: Final answer
    x = 17,506.32

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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.