Home / 7,128.20-10,692.30-5,659.40

Finding the Fourth Proportional to 7,128.20, 10,692.30 and 5,659.40

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Solution

The fourth proportional to 7,128.20, 10,692.30 and 5,659.40 is: 8,489.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.20 : 10,692.30 = 5,659.40 : x
  2. Step 2: Convert to fraction form
    7,128.20/10,692.30 = 5,659.40/x
  3. Step 3: Cross multiply
    7,128.20x = 10,692.30 × 5,659.40
  4. Step 4: Simplify right side
    7,128.20x = 60,512,002.62
  5. Step 5: Solve for x
    x = 60,512,002.62/7,128.20
  6. Step 6: Final answer
    x = 8,489.10

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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.