Home / 21,712.87-29,958.05-12,512.16

Finding the Fourth Proportional to 21,712.87, 29,958.05 and 12,512.16

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Solution

The fourth proportional to 21,712.87, 29,958.05 and 12,512.16 is: 17,263.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,712.87 : 29,958.05 = 12,512.16 : x
  2. Step 2: Convert to fraction form
    21,712.87/29,958.05 = 12,512.16/x
  3. Step 3: Cross multiply
    21,712.87x = 29,958.05 × 12,512.16
  4. Step 4: Simplify right side
    21,712.87x = 374,839,914.89
  5. Step 5: Solve for x
    x = 374,839,914.89/21,712.87
  6. Step 6: Final answer
    x = 17,263.49

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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.