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Finding the Fourth Proportional to 5,862.80, 8,815.80 and 4,912.40

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Solution

The fourth proportional to 5,862.80, 8,815.80 and 4,912.40 is: 7,386.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,862.80 : 8,815.80 = 4,912.40 : x
  2. Step 2: Convert to fraction form
    5,862.80/8,815.80 = 4,912.40/x
  3. Step 3: Cross multiply
    5,862.80x = 8,815.80 × 4,912.40
  4. Step 4: Simplify right side
    5,862.80x = 43,306,735.92
  5. Step 5: Solve for x
    x = 43,306,735.92/5,862.80
  6. Step 6: Final answer
    x = 7,386.70

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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.