Home / 9,102.78-12,543.36-6,978.35

Finding the Fourth Proportional to 9,102.78, 12,543.36 and 6,978.35

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Solution

The fourth proportional to 9,102.78, 12,543.36 and 6,978.35 is: 9,615.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,102.78 : 12,543.36 = 6,978.35 : x
  2. Step 2: Convert to fraction form
    9,102.78/12,543.36 = 6,978.35/x
  3. Step 3: Cross multiply
    9,102.78x = 12,543.36 × 6,978.35
  4. Step 4: Simplify right side
    9,102.78x = 87,531,961.45
  5. Step 5: Solve for x
    x = 87,531,961.45/9,102.78
  6. Step 6: Final answer
    x = 9,615.96

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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.