Home / 13,638.43-18,820.70-8,922.61

Finding the Fourth Proportional to 13,638.43, 18,820.70 and 8,922.61

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Solution

The fourth proportional to 13,638.43, 18,820.70 and 8,922.61 is: 12,312.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.43 : 18,820.70 = 8,922.61 : x
  2. Step 2: Convert to fraction form
    13,638.43/18,820.70 = 8,922.61/x
  3. Step 3: Cross multiply
    13,638.43x = 18,820.70 × 8,922.61
  4. Step 4: Simplify right side
    13,638.43x = 167,929,671.92
  5. Step 5: Solve for x
    x = 167,929,671.92/13,638.43
  6. Step 6: Final answer
    x = 12,312.98

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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.