Home / 13,639.02-20,459-3,779.04

Finding the Fourth Proportional to 13,639.02, 20,459 and 3,779.04

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Solution

The fourth proportional to 13,639.02, 20,459 and 3,779.04 is: 5,668.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.02 : 20,459 = 3,779.04 : x
  2. Step 2: Convert to fraction form
    13,639.02/20,459 = 3,779.04/x
  3. Step 3: Cross multiply
    13,639.02x = 20,459 × 3,779.04
  4. Step 4: Simplify right side
    13,639.02x = 77,315,379.36
  5. Step 5: Solve for x
    x = 77,315,379.36/13,639.02
  6. Step 6: Final answer
    x = 5,668.69

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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.