Home / 21,885.91-30,202.53-12,936.64

Finding the Fourth Proportional to 21,885.91, 30,202.53 and 12,936.64

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Solution

The fourth proportional to 21,885.91, 30,202.53 and 12,936.64 is: 17,852.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,885.91 : 30,202.53 = 12,936.64 : x
  2. Step 2: Convert to fraction form
    21,885.91/30,202.53 = 12,936.64/x
  3. Step 3: Cross multiply
    21,885.91x = 30,202.53 × 12,936.64
  4. Step 4: Simplify right side
    21,885.91x = 390,719,257.70
  5. Step 5: Solve for x
    x = 390,719,257.70/21,885.91
  6. Step 6: Final answer
    x = 17,852.55

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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.