Home / 8,121.63-12,187.30-4,661.31

Finding the Fourth Proportional to 8,121.63, 12,187.30 and 4,661.31

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Solution

The fourth proportional to 8,121.63, 12,187.30 and 4,661.31 is: 6,994.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.63 : 12,187.30 = 4,661.31 : x
  2. Step 2: Convert to fraction form
    8,121.63/12,187.30 = 4,661.31/x
  3. Step 3: Cross multiply
    8,121.63x = 12,187.30 × 4,661.31
  4. Step 4: Simplify right side
    8,121.63x = 56,808,783.36
  5. Step 5: Solve for x
    x = 56,808,783.36/8,121.63
  6. Step 6: Final answer
    x = 6,994.75

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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.