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Finding the Fourth Proportional to 8,622.79, 11,899.12 and 5,271.21

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Solution

The fourth proportional to 8,622.79, 11,899.12 and 5,271.21 is: 7,274.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.79 : 11,899.12 = 5,271.21 : x
  2. Step 2: Convert to fraction form
    8,622.79/11,899.12 = 5,271.21/x
  3. Step 3: Cross multiply
    8,622.79x = 11,899.12 × 5,271.21
  4. Step 4: Simplify right side
    8,622.79x = 62,722,760.34
  5. Step 5: Solve for x
    x = 62,722,760.34/8,622.79
  6. Step 6: Final answer
    x = 7,274.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.