Home / 3,124.60-4,686.90-1,812.40

Finding the Fourth Proportional to 3,124.60, 4,686.90 and 1,812.40

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Solution

The fourth proportional to 3,124.60, 4,686.90 and 1,812.40 is: 2,718.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.60 : 4,686.90 = 1,812.40 : x
  2. Step 2: Convert to fraction form
    3,124.60/4,686.90 = 1,812.40/x
  3. Step 3: Cross multiply
    3,124.60x = 4,686.90 × 1,812.40
  4. Step 4: Simplify right side
    3,124.60x = 8,494,537.56
  5. Step 5: Solve for x
    x = 8,494,537.56/3,124.60
  6. Step 6: Final answer
    x = 2,718.60

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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.