Home / 4,688.21-7,042.35-2,840.21

Finding the Fourth Proportional to 4,688.21, 7,042.35 and 2,840.21

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Solution

The fourth proportional to 4,688.21, 7,042.35 and 2,840.21 is: 4,266.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,688.21 : 7,042.35 = 2,840.21 : x
  2. Step 2: Convert to fraction form
    4,688.21/7,042.35 = 2,840.21/x
  3. Step 3: Cross multiply
    4,688.21x = 7,042.35 × 2,840.21
  4. Step 4: Simplify right side
    4,688.21x = 20,001,752.89
  5. Step 5: Solve for x
    x = 20,001,752.89/4,688.21
  6. Step 6: Final answer
    x = 4,266.39

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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.