Home / 19,885.75-27,419.79-12,706.18

Finding the Fourth Proportional to 19,885.75, 27,419.79 and 12,706.18

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Solution

The fourth proportional to 19,885.75, 27,419.79 and 12,706.18 is: 17,520.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,885.75 : 27,419.79 = 12,706.18 : x
  2. Step 2: Convert to fraction form
    19,885.75/27,419.79 = 12,706.18/x
  3. Step 3: Cross multiply
    19,885.75x = 27,419.79 × 12,706.18
  4. Step 4: Simplify right side
    19,885.75x = 348,400,787.30
  5. Step 5: Solve for x
    x = 348,400,787.30/19,885.75
  6. Step 6: Final answer
    x = 17,520.12

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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.