Home / 5,461.60-8,192.40-3,128.80

Finding the Fourth Proportional to 5,461.60, 8,192.40 and 3,128.80

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Solution

The fourth proportional to 5,461.60, 8,192.40 and 3,128.80 is: 4,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,461.60 : 8,192.40 = 3,128.80 : x
  2. Step 2: Convert to fraction form
    5,461.60/8,192.40 = 3,128.80/x
  3. Step 3: Cross multiply
    5,461.60x = 8,192.40 × 3,128.80
  4. Step 4: Simplify right side
    5,461.60x = 25,632,381.12
  5. Step 5: Solve for x
    x = 25,632,381.12/5,461.60
  6. Step 6: Final answer
    x = 4,693.20

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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.