Home / 2,815.61-3,885.90-1,636.45

Finding the Fourth Proportional to 2,815.61, 3,885.90 and 1,636.45

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Solution

The fourth proportional to 2,815.61, 3,885.90 and 1,636.45 is: 2,258.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.61 : 3,885.90 = 1,636.45 : x
  2. Step 2: Convert to fraction form
    2,815.61/3,885.90 = 1,636.45/x
  3. Step 3: Cross multiply
    2,815.61x = 3,885.90 × 1,636.45
  4. Step 4: Simplify right side
    2,815.61x = 6,359,096.27
  5. Step 5: Solve for x
    x = 6,359,096.27/2,815.61
  6. Step 6: Final answer
    x = 2,258.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.