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Finding the Fourth Proportional to 6,390.77, 8,818.63 and 3,737.66

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Solution

The fourth proportional to 6,390.77, 8,818.63 and 3,737.66 is: 5,157.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.77 : 8,818.63 = 3,737.66 : x
  2. Step 2: Convert to fraction form
    6,390.77/8,818.63 = 3,737.66/x
  3. Step 3: Cross multiply
    6,390.77x = 8,818.63 × 3,737.66
  4. Step 4: Simplify right side
    6,390.77x = 32,960,987.17
  5. Step 5: Solve for x
    x = 32,960,987.17/6,390.77
  6. Step 6: Final answer
    x = 5,157.60

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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.