Home / 7,128.40-10,692.60-4,649.80

Finding the Fourth Proportional to 7,128.40, 10,692.60 and 4,649.80

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Solution

The fourth proportional to 7,128.40, 10,692.60 and 4,649.80 is: 6,974.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.40 : 10,692.60 = 4,649.80 : x
  2. Step 2: Convert to fraction form
    7,128.40/10,692.60 = 4,649.80/x
  3. Step 3: Cross multiply
    7,128.40x = 10,692.60 × 4,649.80
  4. Step 4: Simplify right side
    7,128.40x = 49,718,451.48
  5. Step 5: Solve for x
    x = 49,718,451.48/7,128.40
  6. Step 6: Final answer
    x = 6,974.70

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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.