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Finding the Fourth Proportional to 8,622.98, 11,899.70 and 5,040.40

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Solution

The fourth proportional to 8,622.98, 11,899.70 and 5,040.40 is: 6,955.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.98 : 11,899.70 = 5,040.40 : x
  2. Step 2: Convert to fraction form
    8,622.98/11,899.70 = 5,040.40/x
  3. Step 3: Cross multiply
    8,622.98x = 11,899.70 × 5,040.40
  4. Step 4: Simplify right side
    8,622.98x = 59,979,234.14
  5. Step 5: Solve for x
    x = 59,979,234.14/8,622.98
  6. Step 6: Final answer
    x = 6,955.74

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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.