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Finding the Fourth Proportional to 8,266.40, 12,400.64 and 2,720.40

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Solution

The fourth proportional to 8,266.40, 12,400.64 and 2,720.40 is: 4,080.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,266.40 : 12,400.64 = 2,720.40 : x
  2. Step 2: Convert to fraction form
    8,266.40/12,400.64 = 2,720.40/x
  3. Step 3: Cross multiply
    8,266.40x = 12,400.64 × 2,720.40
  4. Step 4: Simplify right side
    8,266.40x = 33,734,701.06
  5. Step 5: Solve for x
    x = 33,734,701.06/8,266.40
  6. Step 6: Final answer
    x = 4,080.94

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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.