Home / 5,128.58-7,692.87-1,618.91

Finding the Fourth Proportional to 5,128.58, 7,692.87 and 1,618.91

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Solution

The fourth proportional to 5,128.58, 7,692.87 and 1,618.91 is: 2,428.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.58 : 7,692.87 = 1,618.91 : x
  2. Step 2: Convert to fraction form
    5,128.58/7,692.87 = 1,618.91/x
  3. Step 3: Cross multiply
    5,128.58x = 7,692.87 × 1,618.91
  4. Step 4: Simplify right side
    5,128.58x = 12,454,025.71
  5. Step 5: Solve for x
    x = 12,454,025.71/5,128.58
  6. Step 6: Final answer
    x = 2,428.36

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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.