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Finding the Fourth Proportional to 8,171.40, 12,271.95 and 4,890.90

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Solution

The fourth proportional to 8,171.40, 12,271.95 and 4,890.90 is: 7,345.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,171.40 : 12,271.95 = 4,890.90 : x
  2. Step 2: Convert to fraction form
    8,171.40/12,271.95 = 4,890.90/x
  3. Step 3: Cross multiply
    8,171.40x = 12,271.95 × 4,890.90
  4. Step 4: Simplify right side
    8,171.40x = 60,020,880.26
  5. Step 5: Solve for x
    x = 60,020,880.26/8,171.40
  6. Step 6: Final answer
    x = 7,345.24

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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.