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Finding the Fourth Proportional to 6,390.80, 8,818.98 and 3,596.48

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Solution

The fourth proportional to 6,390.80, 8,818.98 and 3,596.48 is: 4,962.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.80 : 8,818.98 = 3,596.48 : x
  2. Step 2: Convert to fraction form
    6,390.80/8,818.98 = 3,596.48/x
  3. Step 3: Cross multiply
    6,390.80x = 8,818.98 × 3,596.48
  4. Step 4: Simplify right side
    6,390.80x = 31,717,285.19
  5. Step 5: Solve for x
    x = 31,717,285.19/6,390.80
  6. Step 6: Final answer
    x = 4,962.96

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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.