Home / 12,311.65-18,465.39-3,990.46

Finding the Fourth Proportional to 12,311.65, 18,465.39 and 3,990.46

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Solution

The fourth proportional to 12,311.65, 18,465.39 and 3,990.46 is: 5,985.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,311.65 : 18,465.39 = 3,990.46 : x
  2. Step 2: Convert to fraction form
    12,311.65/18,465.39 = 3,990.46/x
  3. Step 3: Cross multiply
    12,311.65x = 18,465.39 × 3,990.46
  4. Step 4: Simplify right side
    12,311.65x = 73,685,400.18
  5. Step 5: Solve for x
    x = 73,685,400.18/12,311.65
  6. Step 6: Final answer
    x = 5,985.01

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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.