Home / 4,815.12-7,221.65-2,812.48

Finding the Fourth Proportional to 4,815.12, 7,221.65 and 2,812.48

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Solution

The fourth proportional to 4,815.12, 7,221.65 and 2,812.48 is: 4,218.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,815.12 : 7,221.65 = 2,812.48 : x
  2. Step 2: Convert to fraction form
    4,815.12/7,221.65 = 2,812.48/x
  3. Step 3: Cross multiply
    4,815.12x = 7,221.65 × 2,812.48
  4. Step 4: Simplify right side
    4,815.12x = 20,310,746.19
  5. Step 5: Solve for x
    x = 20,310,746.19/4,815.12
  6. Step 6: Final answer
    x = 4,218.12

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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.