Home / 30,121.87-45,189.96-10,400.59

Finding the Fourth Proportional to 30,121.87, 45,189.96 and 10,400.59

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Solution

The fourth proportional to 30,121.87, 45,189.96 and 10,400.59 is: 15,603.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,121.87 : 45,189.96 = 10,400.59 : x
  2. Step 2: Convert to fraction form
    30,121.87/45,189.96 = 10,400.59/x
  3. Step 3: Cross multiply
    30,121.87x = 45,189.96 × 10,400.59
  4. Step 4: Simplify right side
    30,121.87x = 470,002,246.08
  5. Step 5: Solve for x
    x = 470,002,246.08/30,121.87
  6. Step 6: Final answer
    x = 15,603.36

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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.