Home / 7,878.22-11,817.32-5,405.53

Finding the Fourth Proportional to 7,878.22, 11,817.32 and 5,405.53

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Solution

The fourth proportional to 7,878.22, 11,817.32 and 5,405.53 is: 8,108.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.22 : 11,817.32 = 5,405.53 : x
  2. Step 2: Convert to fraction form
    7,878.22/11,817.32 = 5,405.53/x
  3. Step 3: Cross multiply
    7,878.22x = 11,817.32 × 5,405.53
  4. Step 4: Simplify right side
    7,878.22x = 63,878,877.78
  5. Step 5: Solve for x
    x = 63,878,877.78/7,878.22
  6. Step 6: Final answer
    x = 8,108.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.