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Finding the Fourth Proportional to 8,789.98, 12,130.78 and 5,800.64

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Solution

The fourth proportional to 8,789.98, 12,130.78 and 5,800.64 is: 8,005.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.98 : 12,130.78 = 5,800.64 : x
  2. Step 2: Convert to fraction form
    8,789.98/12,130.78 = 5,800.64/x
  3. Step 3: Cross multiply
    8,789.98x = 12,130.78 × 5,800.64
  4. Step 4: Simplify right side
    8,789.98x = 70,366,287.70
  5. Step 5: Solve for x
    x = 70,366,287.70/8,789.98
  6. Step 6: Final answer
    x = 8,005.28

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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.