Home / 21,872.36-30,184.43-12,312.60

Finding the Fourth Proportional to 21,872.36, 30,184.43 and 12,312.60

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Solution

The fourth proportional to 21,872.36, 30,184.43 and 12,312.60 is: 16,991.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,872.36 : 30,184.43 = 12,312.60 : x
  2. Step 2: Convert to fraction form
    21,872.36/30,184.43 = 12,312.60/x
  3. Step 3: Cross multiply
    21,872.36x = 30,184.43 × 12,312.60
  4. Step 4: Simplify right side
    21,872.36x = 371,648,792.22
  5. Step 5: Solve for x
    x = 371,648,792.22/21,872.36
  6. Step 6: Final answer
    x = 16,991.71

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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.