Home / 8,779.44-12,117.60-5,635.20

Finding the Fourth Proportional to 8,779.44, 12,117.60 and 5,635.20

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Solution

The fourth proportional to 8,779.44, 12,117.60 and 5,635.20 is: 7,777.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.44 : 12,117.60 = 5,635.20 : x
  2. Step 2: Convert to fraction form
    8,779.44/12,117.60 = 5,635.20/x
  3. Step 3: Cross multiply
    8,779.44x = 12,117.60 × 5,635.20
  4. Step 4: Simplify right side
    8,779.44x = 68,285,099.52
  5. Step 5: Solve for x
    x = 68,285,099.52/8,779.44
  6. Step 6: Final answer
    x = 7,777.84

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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.