Home / 12,779.38-19,167.63-3,420.37

Finding the Fourth Proportional to 12,779.38, 19,167.63 and 3,420.37

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Solution

The fourth proportional to 12,779.38, 19,167.63 and 3,420.37 is: 5,130.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.38 : 19,167.63 = 3,420.37 : x
  2. Step 2: Convert to fraction form
    12,779.38/19,167.63 = 3,420.37/x
  3. Step 3: Cross multiply
    12,779.38x = 19,167.63 × 3,420.37
  4. Step 4: Simplify right side
    12,779.38x = 65,560,386.62
  5. Step 5: Solve for x
    x = 65,560,386.62/12,779.38
  6. Step 6: Final answer
    x = 5,130.17

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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.