Home / 4,187.80-6,276.30-1,991.80

Finding the Fourth Proportional to 4,187.80, 6,276.30 and 1,991.80

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Solution

The fourth proportional to 4,187.80, 6,276.30 and 1,991.80 is: 2,985.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,187.80 : 6,276.30 = 1,991.80 : x
  2. Step 2: Convert to fraction form
    4,187.80/6,276.30 = 1,991.80/x
  3. Step 3: Cross multiply
    4,187.80x = 6,276.30 × 1,991.80
  4. Step 4: Simplify right side
    4,187.80x = 12,501,134.34
  5. Step 5: Solve for x
    x = 12,501,134.34/4,187.80
  6. Step 6: Final answer
    x = 2,985.13

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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.