Home / 3,130.19-4,319.78-2,109.53

Finding the Fourth Proportional to 3,130.19, 4,319.78 and 2,109.53

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Solution

The fourth proportional to 3,130.19, 4,319.78 and 2,109.53 is: 2,911.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.19 : 4,319.78 = 2,109.53 : x
  2. Step 2: Convert to fraction form
    3,130.19/4,319.78 = 2,109.53/x
  3. Step 3: Cross multiply
    3,130.19x = 4,319.78 × 2,109.53
  4. Step 4: Simplify right side
    3,130.19x = 9,112,673.36
  5. Step 5: Solve for x
    x = 9,112,673.36/3,130.19
  6. Step 6: Final answer
    x = 2,911.23

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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.