Home / 3,109.95-4,289.55-2,113.49

Finding the Fourth Proportional to 3,109.95, 4,289.55 and 2,113.49

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Solution

The fourth proportional to 3,109.95, 4,289.55 and 2,113.49 is: 2,915.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.95 : 4,289.55 = 2,113.49 : x
  2. Step 2: Convert to fraction form
    3,109.95/4,289.55 = 2,113.49/x
  3. Step 3: Cross multiply
    3,109.95x = 4,289.55 × 2,113.49
  4. Step 4: Simplify right side
    3,109.95x = 9,065,899.58
  5. Step 5: Solve for x
    x = 9,065,899.58/3,109.95
  6. Step 6: Final answer
    x = 2,915.13

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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.