Home / 3,122.40-4,307.28-2,114.13

Finding the Fourth Proportional to 3,122.40, 4,307.28 and 2,114.13

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Solution

The fourth proportional to 3,122.40, 4,307.28 and 2,114.13 is: 2,916.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.40 : 4,307.28 = 2,114.13 : x
  2. Step 2: Convert to fraction form
    3,122.40/4,307.28 = 2,114.13/x
  3. Step 3: Cross multiply
    3,122.40x = 4,307.28 × 2,114.13
  4. Step 4: Simplify right side
    3,122.40x = 9,106,149.87
  5. Step 5: Solve for x
    x = 9,106,149.87/3,122.40
  6. Step 6: Final answer
    x = 2,916.39

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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.