Home / 21,004.31-31,506.47-5,421.94

Finding the Fourth Proportional to 21,004.31, 31,506.47 and 5,421.94

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Solution

The fourth proportional to 21,004.31, 31,506.47 and 5,421.94 is: 8,132.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.31 : 31,506.47 = 5,421.94 : x
  2. Step 2: Convert to fraction form
    21,004.31/31,506.47 = 5,421.94/x
  3. Step 3: Cross multiply
    21,004.31x = 31,506.47 × 5,421.94
  4. Step 4: Simplify right side
    21,004.31x = 170,826,104.41
  5. Step 5: Solve for x
    x = 170,826,104.41/21,004.31
  6. Step 6: Final answer
    x = 8,132.91

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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.