Home / 12,939.87-19,413.90-4,619.70

Finding the Fourth Proportional to 12,939.87, 19,413.90 and 4,619.70

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Solution

The fourth proportional to 12,939.87, 19,413.90 and 4,619.70 is: 6,931.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.87 : 19,413.90 = 4,619.70 : x
  2. Step 2: Convert to fraction form
    12,939.87/19,413.90 = 4,619.70/x
  3. Step 3: Cross multiply
    12,939.87x = 19,413.90 × 4,619.70
  4. Step 4: Simplify right side
    12,939.87x = 89,686,393.83
  5. Step 5: Solve for x
    x = 89,686,393.83/12,939.87
  6. Step 6: Final answer
    x = 6,931.01

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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.