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Finding the Fourth Proportional to 5,671.85, 8,506.65 and 5,390.55

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Solution

The fourth proportional to 5,671.85, 8,506.65 and 5,390.55 is: 8,084.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,671.85 : 8,506.65 = 5,390.55 : x
  2. Step 2: Convert to fraction form
    5,671.85/8,506.65 = 5,390.55/x
  3. Step 3: Cross multiply
    5,671.85x = 8,506.65 × 5,390.55
  4. Step 4: Simplify right side
    5,671.85x = 45,855,496.89
  5. Step 5: Solve for x
    x = 45,855,496.89/5,671.85
  6. Step 6: Final answer
    x = 8,084.75

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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.