Home / 21,679.84-29,912.16-13,725.46

Finding the Fourth Proportional to 21,679.84, 29,912.16 and 13,725.46

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Solution

The fourth proportional to 21,679.84, 29,912.16 and 13,725.46 is: 18,937.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.84 : 29,912.16 = 13,725.46 : x
  2. Step 2: Convert to fraction form
    21,679.84/29,912.16 = 13,725.46/x
  3. Step 3: Cross multiply
    21,679.84x = 29,912.16 × 13,725.46
  4. Step 4: Simplify right side
    21,679.84x = 410,558,155.59
  5. Step 5: Solve for x
    x = 410,558,155.59/21,679.84
  6. Step 6: Final answer
    x = 18,937.32

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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.