Home / 2,115.81-3,159.05-1,984.59

Finding the Fourth Proportional to 2,115.81, 3,159.05 and 1,984.59

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Solution

The fourth proportional to 2,115.81, 3,159.05 and 1,984.59 is: 2,963.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.81 : 3,159.05 = 1,984.59 : x
  2. Step 2: Convert to fraction form
    2,115.81/3,159.05 = 1,984.59/x
  3. Step 3: Cross multiply
    2,115.81x = 3,159.05 × 1,984.59
  4. Step 4: Simplify right side
    2,115.81x = 6,269,409.12
  5. Step 5: Solve for x
    x = 6,269,409.12/2,115.81
  6. Step 6: Final answer
    x = 2,963.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.