Home / 21,872.13-30,183.22-12,312.01

Finding the Fourth Proportional to 21,872.13, 30,183.22 and 12,312.01

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Solution

The fourth proportional to 21,872.13, 30,183.22 and 12,312.01 is: 16,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,872.13 : 30,183.22 = 12,312.01 : x
  2. Step 2: Convert to fraction form
    21,872.13/30,183.22 = 12,312.01/x
  3. Step 3: Cross multiply
    21,872.13x = 30,183.22 × 12,312.01
  4. Step 4: Simplify right side
    21,872.13x = 371,616,184.72
  5. Step 5: Solve for x
    x = 371,616,184.72/21,872.13
  6. Step 6: Final answer
    x = 16,990.40

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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.