Home / 6,390.21-8,818.30-3,557.44

Finding the Fourth Proportional to 6,390.21, 8,818.30 and 3,557.44

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Solution

The fourth proportional to 6,390.21, 8,818.30 and 3,557.44 is: 4,909.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.21 : 8,818.30 = 3,557.44 : x
  2. Step 2: Convert to fraction form
    6,390.21/8,818.30 = 3,557.44/x
  3. Step 3: Cross multiply
    6,390.21x = 8,818.30 × 3,557.44
  4. Step 4: Simplify right side
    6,390.21x = 31,370,573.15
  5. Step 5: Solve for x
    x = 31,370,573.15/6,390.21
  6. Step 6: Final answer
    x = 4,909.16

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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.