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Finding the Fourth Proportional to 8,461.79, 12,697.94 and 4,079.69

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Solution

The fourth proportional to 8,461.79, 12,697.94 and 4,079.69 is: 6,122.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,461.79 : 12,697.94 = 4,079.69 : x
  2. Step 2: Convert to fraction form
    8,461.79/12,697.94 = 4,079.69/x
  3. Step 3: Cross multiply
    8,461.79x = 12,697.94 × 4,079.69
  4. Step 4: Simplify right side
    8,461.79x = 51,803,638.44
  5. Step 5: Solve for x
    x = 51,803,638.44/8,461.79
  6. Step 6: Final answer
    x = 6,122.07

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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.