Home / 3,120.21-4,307.65-2,164.50

Finding the Fourth Proportional to 3,120.21, 4,307.65 and 2,164.50

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Solution

The fourth proportional to 3,120.21, 4,307.65 and 2,164.50 is: 2,988.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.21 : 4,307.65 = 2,164.50 : x
  2. Step 2: Convert to fraction form
    3,120.21/4,307.65 = 2,164.50/x
  3. Step 3: Cross multiply
    3,120.21x = 4,307.65 × 2,164.50
  4. Step 4: Simplify right side
    3,120.21x = 9,323,903.01
  5. Step 5: Solve for x
    x = 9,323,903.01/3,120.21
  6. Step 6: Final answer
    x = 2,988.23

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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.