Home / 18,611.28-25,669.44-12,312.72

Finding the Fourth Proportional to 18,611.28, 25,669.44 and 12,312.72

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Solution

The fourth proportional to 18,611.28, 25,669.44 and 12,312.72 is: 16,982.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.28 : 25,669.44 = 12,312.72 : x
  2. Step 2: Convert to fraction form
    18,611.28/25,669.44 = 12,312.72/x
  3. Step 3: Cross multiply
    18,611.28x = 25,669.44 × 12,312.72
  4. Step 4: Simplify right side
    18,611.28x = 316,060,627.28
  5. Step 5: Solve for x
    x = 316,060,627.28/18,611.28
  6. Step 6: Final answer
    x = 16,982.21

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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.