Home / 21,817.46-30,103.44-12,861.70

Finding the Fourth Proportional to 21,817.46, 30,103.44 and 12,861.70

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Solution

The fourth proportional to 21,817.46, 30,103.44 and 12,861.70 is: 17,746.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,817.46 : 30,103.44 = 12,861.70 : x
  2. Step 2: Convert to fraction form
    21,817.46/30,103.44 = 12,861.70/x
  3. Step 3: Cross multiply
    21,817.46x = 30,103.44 × 12,861.70
  4. Step 4: Simplify right side
    21,817.46x = 387,181,414.25
  5. Step 5: Solve for x
    x = 387,181,414.25/21,817.46
  6. Step 6: Final answer
    x = 17,746.40

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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.