Home / 2,930.40-4,038.84-2,091.60

Finding the Fourth Proportional to 2,930.40, 4,038.84 and 2,091.60

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Solution

The fourth proportional to 2,930.40, 4,038.84 and 2,091.60 is: 2,882.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,930.40 : 4,038.84 = 2,091.60 : x
  2. Step 2: Convert to fraction form
    2,930.40/4,038.84 = 2,091.60/x
  3. Step 3: Cross multiply
    2,930.40x = 4,038.84 × 2,091.60
  4. Step 4: Simplify right side
    2,930.40x = 8,447,637.74
  5. Step 5: Solve for x
    x = 8,447,637.74/2,930.40
  6. Step 6: Final answer
    x = 2,882.76

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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.