Home / 13,139.92-19,706.90-3,779.92

Finding the Fourth Proportional to 13,139.92, 19,706.90 and 3,779.92

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Solution

The fourth proportional to 13,139.92, 19,706.90 and 3,779.92 is: 5,669.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.92 : 19,706.90 = 3,779.92 : x
  2. Step 2: Convert to fraction form
    13,139.92/19,706.90 = 3,779.92/x
  3. Step 3: Cross multiply
    13,139.92x = 19,706.90 × 3,779.92
  4. Step 4: Simplify right side
    13,139.92x = 74,490,505.45
  5. Step 5: Solve for x
    x = 74,490,505.45/13,139.92
  6. Step 6: Final answer
    x = 5,669.02

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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.