Home / 13,779.22-19,014.02-7,811.40

Finding the Fourth Proportional to 13,779.22, 19,014.02 and 7,811.40

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Solution

The fourth proportional to 13,779.22, 19,014.02 and 7,811.40 is: 10,778.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.22 : 19,014.02 = 7,811.40 : x
  2. Step 2: Convert to fraction form
    13,779.22/19,014.02 = 7,811.40/x
  3. Step 3: Cross multiply
    13,779.22x = 19,014.02 × 7,811.40
  4. Step 4: Simplify right side
    13,779.22x = 148,526,115.83
  5. Step 5: Solve for x
    x = 148,526,115.83/13,779.22
  6. Step 6: Final answer
    x = 10,778.99

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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.