Home / 69,638.12-104,474.34-20,390.12

Finding the Fourth Proportional to 69,638.12, 104,474.34 and 20,390.12

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Solution

The fourth proportional to 69,638.12, 104,474.34 and 20,390.12 is: 30,590.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,638.12 : 104,474.34 = 20,390.12 : x
  2. Step 2: Convert to fraction form
    69,638.12/104,474.34 = 20,390.12/x
  3. Step 3: Cross multiply
    69,638.12x = 104,474.34 × 20,390.12
  4. Step 4: Simplify right side
    69,638.12x = 2,130,244,329.52
  5. Step 5: Solve for x
    x = 2,130,244,329.52/69,638.12
  6. Step 6: Final answer
    x = 30,590.20

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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.