Home / 5,428.60-8,148.30-2,658.40

Finding the Fourth Proportional to 5,428.60, 8,148.30 and 2,658.40

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Solution

The fourth proportional to 5,428.60, 8,148.30 and 2,658.40 is: 3,990.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.60 : 8,148.30 = 2,658.40 : x
  2. Step 2: Convert to fraction form
    5,428.60/8,148.30 = 2,658.40/x
  3. Step 3: Cross multiply
    5,428.60x = 8,148.30 × 2,658.40
  4. Step 4: Simplify right side
    5,428.60x = 21,661,440.72
  5. Step 5: Solve for x
    x = 21,661,440.72/5,428.60
  6. Step 6: Final answer
    x = 3,990.24

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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.