Home / 13,611.02-20,333.84-8,640.86

Finding the Fourth Proportional to 13,611.02, 20,333.84 and 8,640.86

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Solution

The fourth proportional to 13,611.02, 20,333.84 and 8,640.86 is: 12,908.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.02 : 20,333.84 = 8,640.86 : x
  2. Step 2: Convert to fraction form
    13,611.02/20,333.84 = 8,640.86/x
  3. Step 3: Cross multiply
    13,611.02x = 20,333.84 × 8,640.86
  4. Step 4: Simplify right side
    13,611.02x = 175,701,864.70
  5. Step 5: Solve for x
    x = 175,701,864.70/13,611.02
  6. Step 6: Final answer
    x = 12,908.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.