Home / 8,106.40-12,159.60-4,640.80

Finding the Fourth Proportional to 8,106.40, 12,159.60 and 4,640.80

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Solution

The fourth proportional to 8,106.40, 12,159.60 and 4,640.80 is: 6,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,106.40 : 12,159.60 = 4,640.80 : x
  2. Step 2: Convert to fraction form
    8,106.40/12,159.60 = 4,640.80/x
  3. Step 3: Cross multiply
    8,106.40x = 12,159.60 × 4,640.80
  4. Step 4: Simplify right side
    8,106.40x = 56,430,271.68
  5. Step 5: Solve for x
    x = 56,430,271.68/8,106.40
  6. Step 6: Final answer
    x = 6,961.20

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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.