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Finding the Fourth Proportional to 5,611.86, 8,416.71 and 1,913.76

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Solution

The fourth proportional to 5,611.86, 8,416.71 and 1,913.76 is: 2,870.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,611.86 : 8,416.71 = 1,913.76 : x
  2. Step 2: Convert to fraction form
    5,611.86/8,416.71 = 1,913.76/x
  3. Step 3: Cross multiply
    5,611.86x = 8,416.71 × 1,913.76
  4. Step 4: Simplify right side
    5,611.86x = 16,107,562.93
  5. Step 5: Solve for x
    x = 16,107,562.93/5,611.86
  6. Step 6: Final answer
    x = 2,870.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.