Home / 2,120.36-2,923.40-1,515.42

Finding the Fourth Proportional to 2,120.36, 2,923.40 and 1,515.42

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Solution

The fourth proportional to 2,120.36, 2,923.40 and 1,515.42 is: 2,089.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.36 : 2,923.40 = 1,515.42 : x
  2. Step 2: Convert to fraction form
    2,120.36/2,923.40 = 1,515.42/x
  3. Step 3: Cross multiply
    2,120.36x = 2,923.40 × 1,515.42
  4. Step 4: Simplify right side
    2,120.36x = 4,430,178.35
  5. Step 5: Solve for x
    x = 4,430,178.35/2,120.36
  6. Step 6: Final answer
    x = 2,089.36

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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.