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Finding the Fourth Proportional to 6,393.40, 8,817.78 and 4,897.60

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Solution

The fourth proportional to 6,393.40, 8,817.78 and 4,897.60 is: 6,754.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,393.40 : 8,817.78 = 4,897.60 : x
  2. Step 2: Convert to fraction form
    6,393.40/8,817.78 = 4,897.60/x
  3. Step 3: Cross multiply
    6,393.40x = 8,817.78 × 4,897.60
  4. Step 4: Simplify right side
    6,393.40x = 43,185,959.33
  5. Step 5: Solve for x
    x = 43,185,959.33/6,393.40
  6. Step 6: Final answer
    x = 6,754.77

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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.