Home / 8,990.46-13,485.69-3,145.71

Finding the Fourth Proportional to 8,990.46, 13,485.69 and 3,145.71

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Solution

The fourth proportional to 8,990.46, 13,485.69 and 3,145.71 is: 4,718.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.46 : 13,485.69 = 3,145.71 : x
  2. Step 2: Convert to fraction form
    8,990.46/13,485.69 = 3,145.71/x
  3. Step 3: Cross multiply
    8,990.46x = 13,485.69 × 3,145.71
  4. Step 4: Simplify right side
    8,990.46x = 42,422,069.89
  5. Step 5: Solve for x
    x = 42,422,069.89/8,990.46
  6. Step 6: Final answer
    x = 4,718.57

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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.