Home / 2,423.60-3,639.80-2,121.20

Finding the Fourth Proportional to 2,423.60, 3,639.80 and 2,121.20

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Solution

The fourth proportional to 2,423.60, 3,639.80 and 2,121.20 is: 3,185.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,423.60 : 3,639.80 = 2,121.20 : x
  2. Step 2: Convert to fraction form
    2,423.60/3,639.80 = 2,121.20/x
  3. Step 3: Cross multiply
    2,423.60x = 3,639.80 × 2,121.20
  4. Step 4: Simplify right side
    2,423.60x = 7,720,743.76
  5. Step 5: Solve for x
    x = 7,720,743.76/2,423.60
  6. Step 6: Final answer
    x = 3,185.65

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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.