Home / 21,112.66-29,135.30-12,618.46

Finding the Fourth Proportional to 21,112.66, 29,135.30 and 12,618.46

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Solution

The fourth proportional to 21,112.66, 29,135.30 and 12,618.46 is: 17,413.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.66 : 29,135.30 = 12,618.46 : x
  2. Step 2: Convert to fraction form
    21,112.66/29,135.30 = 12,618.46/x
  3. Step 3: Cross multiply
    21,112.66x = 29,135.30 × 12,618.46
  4. Step 4: Simplify right side
    21,112.66x = 367,642,617.64
  5. Step 5: Solve for x
    x = 367,642,617.64/21,112.66
  6. Step 6: Final answer
    x = 17,413.37

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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.