Home / 5,128.11-7,692.57-1,665.36

Finding the Fourth Proportional to 5,128.11, 7,692.57 and 1,665.36

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Solution

The fourth proportional to 5,128.11, 7,692.57 and 1,665.36 is: 2,498.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.11 : 7,692.57 = 1,665.36 : x
  2. Step 2: Convert to fraction form
    5,128.11/7,692.57 = 1,665.36/x
  3. Step 3: Cross multiply
    5,128.11x = 7,692.57 × 1,665.36
  4. Step 4: Simplify right side
    5,128.11x = 12,810,898.38
  5. Step 5: Solve for x
    x = 12,810,898.38/5,128.11
  6. Step 6: Final answer
    x = 2,498.17

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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.