Home / 5,186.36-7,779.50-1,290.74

Finding the Fourth Proportional to 5,186.36, 7,779.50 and 1,290.74

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Solution

The fourth proportional to 5,186.36, 7,779.50 and 1,290.74 is: 1,936.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,186.36 : 7,779.50 = 1,290.74 : x
  2. Step 2: Convert to fraction form
    5,186.36/7,779.50 = 1,290.74/x
  3. Step 3: Cross multiply
    5,186.36x = 7,779.50 × 1,290.74
  4. Step 4: Simplify right side
    5,186.36x = 10,041,311.83
  5. Step 5: Solve for x
    x = 10,041,311.83/5,186.36
  6. Step 6: Final answer
    x = 1,936.10

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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.