Home / 42,986.09-64,497.36-20,815.99

Finding the Fourth Proportional to 42,986.09, 64,497.36 and 20,815.99

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Solution

The fourth proportional to 42,986.09, 64,497.36 and 20,815.99 is: 31,232.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,986.09 : 64,497.36 = 20,815.99 : x
  2. Step 2: Convert to fraction form
    42,986.09/64,497.36 = 20,815.99/x
  3. Step 3: Cross multiply
    42,986.09x = 64,497.36 × 20,815.99
  4. Step 4: Simplify right side
    42,986.09x = 1,342,576,317.60
  5. Step 5: Solve for x
    x = 1,342,576,317.60/42,986.09
  6. Step 6: Final answer
    x = 31,232.81

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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.