Home / 5,629.60-8,428.20-5,309.20

Finding the Fourth Proportional to 5,629.60, 8,428.20 and 5,309.20

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Solution

The fourth proportional to 5,629.60, 8,428.20 and 5,309.20 is: 7,948.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,629.60 : 8,428.20 = 5,309.20 : x
  2. Step 2: Convert to fraction form
    5,629.60/8,428.20 = 5,309.20/x
  3. Step 3: Cross multiply
    5,629.60x = 8,428.20 × 5,309.20
  4. Step 4: Simplify right side
    5,629.60x = 44,746,999.44
  5. Step 5: Solve for x
    x = 44,746,999.44/5,629.60
  6. Step 6: Final answer
    x = 7,948.52

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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.