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Finding the Fourth Proportional to 8,761.40, 12,090.21 and 4,984.01

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Solution

The fourth proportional to 8,761.40, 12,090.21 and 4,984.01 is: 6,877.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.40 : 12,090.21 = 4,984.01 : x
  2. Step 2: Convert to fraction form
    8,761.40/12,090.21 = 4,984.01/x
  3. Step 3: Cross multiply
    8,761.40x = 12,090.21 × 4,984.01
  4. Step 4: Simplify right side
    8,761.40x = 60,257,727.54
  5. Step 5: Solve for x
    x = 60,257,727.54/8,761.40
  6. Step 6: Final answer
    x = 6,877.64

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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.