Home / 3,779.36-5,215.36-2,100.77

Finding the Fourth Proportional to 3,779.36, 5,215.36 and 2,100.77

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Solution

The fourth proportional to 3,779.36, 5,215.36 and 2,100.77 is: 2,898.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,779.36 : 5,215.36 = 2,100.77 : x
  2. Step 2: Convert to fraction form
    3,779.36/5,215.36 = 2,100.77/x
  3. Step 3: Cross multiply
    3,779.36x = 5,215.36 × 2,100.77
  4. Step 4: Simplify right side
    3,779.36x = 10,956,240.50
  5. Step 5: Solve for x
    x = 10,956,240.50/3,779.36
  6. Step 6: Final answer
    x = 2,898.97

Related Problems

Find fourth proportional to 1,889.68, 2,607.68 and 1,050.38
Half scale
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Double scale
Find fourth proportional to 3,780.36, 5,216.74 and 2,101.77
Similar ratio
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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.