Home / 3,916.40-5,398.34-3,075.77

Finding the Fourth Proportional to 3,916.40, 5,398.34 and 3,075.77

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Solution

The fourth proportional to 3,916.40, 5,398.34 and 3,075.77 is: 4,239.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.40 : 5,398.34 = 3,075.77 : x
  2. Step 2: Convert to fraction form
    3,916.40/5,398.34 = 3,075.77/x
  3. Step 3: Cross multiply
    3,916.40x = 5,398.34 × 3,075.77
  4. Step 4: Simplify right side
    3,916.40x = 16,604,050.34
  5. Step 5: Solve for x
    x = 16,604,050.34/3,916.40
  6. Step 6: Final answer
    x = 4,239.63

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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.