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Finding the Fourth Proportional to 8,998.80, 12,415.03 and 5,641.75

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Solution

The fourth proportional to 8,998.80, 12,415.03 and 5,641.75 is: 7,783.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,998.80 : 12,415.03 = 5,641.75 : x
  2. Step 2: Convert to fraction form
    8,998.80/12,415.03 = 5,641.75/x
  3. Step 3: Cross multiply
    8,998.80x = 12,415.03 × 5,641.75
  4. Step 4: Simplify right side
    8,998.80x = 70,042,495.50
  5. Step 5: Solve for x
    x = 70,042,495.50/8,998.80
  6. Step 6: Final answer
    x = 7,783.54

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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.