Home / 21,022.16-29,015.88-12,643.60

Finding the Fourth Proportional to 21,022.16, 29,015.88 and 12,643.60

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Solution

The fourth proportional to 21,022.16, 29,015.88 and 12,643.60 is: 17,451.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.16 : 29,015.88 = 12,643.60 : x
  2. Step 2: Convert to fraction form
    21,022.16/29,015.88 = 12,643.60/x
  3. Step 3: Cross multiply
    21,022.16x = 29,015.88 × 12,643.60
  4. Step 4: Simplify right side
    21,022.16x = 366,865,180.37
  5. Step 5: Solve for x
    x = 366,865,180.37/21,022.16
  6. Step 6: Final answer
    x = 17,451.36

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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.