Home / 7,021.61-9,690.47-4,039.19

Finding the Fourth Proportional to 7,021.61, 9,690.47 and 4,039.19

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Solution

The fourth proportional to 7,021.61, 9,690.47 and 4,039.19 is: 5,574.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.61 : 9,690.47 = 4,039.19 : x
  2. Step 2: Convert to fraction form
    7,021.61/9,690.47 = 4,039.19/x
  3. Step 3: Cross multiply
    7,021.61x = 9,690.47 × 4,039.19
  4. Step 4: Simplify right side
    7,021.61x = 39,141,580.87
  5. Step 5: Solve for x
    x = 39,141,580.87/7,021.61
  6. Step 6: Final answer
    x = 5,574.45

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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.