Home / 7,021.20-9,688.99-3,877.32

Finding the Fourth Proportional to 7,021.20, 9,688.99 and 3,877.32

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Solution

The fourth proportional to 7,021.20, 9,688.99 and 3,877.32 is: 5,350.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.20 : 9,688.99 = 3,877.32 : x
  2. Step 2: Convert to fraction form
    7,021.20/9,688.99 = 3,877.32/x
  3. Step 3: Cross multiply
    7,021.20x = 9,688.99 × 3,877.32
  4. Step 4: Simplify right side
    7,021.20x = 37,567,314.71
  5. Step 5: Solve for x
    x = 37,567,314.71/7,021.20
  6. Step 6: Final answer
    x = 5,350.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.