Home / 5,128.30-7,692.75-1,430.45

Finding the Fourth Proportional to 5,128.30, 7,692.75 and 1,430.45

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Solution

The fourth proportional to 5,128.30, 7,692.75 and 1,430.45 is: 2,145.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.30 : 7,692.75 = 1,430.45 : x
  2. Step 2: Convert to fraction form
    5,128.30/7,692.75 = 1,430.45/x
  3. Step 3: Cross multiply
    5,128.30x = 7,692.75 × 1,430.45
  4. Step 4: Simplify right side
    5,128.30x = 11,004,094.24
  5. Step 5: Solve for x
    x = 11,004,094.24/5,128.30
  6. Step 6: Final answer
    x = 2,145.76

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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.