Home / 12,821.40-19,199.70-8,127.12

Finding the Fourth Proportional to 12,821.40, 19,199.70 and 8,127.12

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Solution

The fourth proportional to 12,821.40, 19,199.70 and 8,127.12 is: 12,170.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.40 : 19,199.70 = 8,127.12 : x
  2. Step 2: Convert to fraction form
    12,821.40/19,199.70 = 8,127.12/x
  3. Step 3: Cross multiply
    12,821.40x = 19,199.70 × 8,127.12
  4. Step 4: Simplify right side
    12,821.40x = 156,038,265.86
  5. Step 5: Solve for x
    x = 156,038,265.86/12,821.40
  6. Step 6: Final answer
    x = 12,170.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.