Home / 7,021.89-9,688.68-4,187.97

Finding the Fourth Proportional to 7,021.89, 9,688.68 and 4,187.97

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Solution

The fourth proportional to 7,021.89, 9,688.68 and 4,187.97 is: 5,778.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.89 : 9,688.68 = 4,187.97 : x
  2. Step 2: Convert to fraction form
    7,021.89/9,688.68 = 4,187.97/x
  3. Step 3: Cross multiply
    7,021.89x = 9,688.68 × 4,187.97
  4. Step 4: Simplify right side
    7,021.89x = 40,575,901.18
  5. Step 5: Solve for x
    x = 40,575,901.18/7,021.89
  6. Step 6: Final answer
    x = 5,778.49

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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.