Home / 2,123-2,931.90-2,108.60

Finding the Fourth Proportional to 2,123, 2,931.90 and 2,108.60

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Solution

The fourth proportional to 2,123, 2,931.90 and 2,108.60 is: 2,912.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123 : 2,931.90 = 2,108.60 : x
  2. Step 2: Convert to fraction form
    2,123/2,931.90 = 2,108.60/x
  3. Step 3: Cross multiply
    2,123x = 2,931.90 × 2,108.60
  4. Step 4: Simplify right side
    2,123x = 6,182,204.34
  5. Step 5: Solve for x
    x = 6,182,204.34/2,123
  6. Step 6: Final answer
    x = 2,912.01

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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.