Home / 5,385.40-8,075.67-1,686.73

Finding the Fourth Proportional to 5,385.40, 8,075.67 and 1,686.73

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Solution

The fourth proportional to 5,385.40, 8,075.67 and 1,686.73 is: 2,529.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.40 : 8,075.67 = 1,686.73 : x
  2. Step 2: Convert to fraction form
    5,385.40/8,075.67 = 1,686.73/x
  3. Step 3: Cross multiply
    5,385.40x = 8,075.67 × 1,686.73
  4. Step 4: Simplify right side
    5,385.40x = 13,621,474.86
  5. Step 5: Solve for x
    x = 13,621,474.86/5,385.40
  6. Step 6: Final answer
    x = 2,529.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.