Home / 20,977.30-31,400.34-15,681.52

Finding the Fourth Proportional to 20,977.30, 31,400.34 and 15,681.52

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Solution

The fourth proportional to 20,977.30, 31,400.34 and 15,681.52 is: 23,473.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.30 : 31,400.34 = 15,681.52 : x
  2. Step 2: Convert to fraction form
    20,977.30/31,400.34 = 15,681.52/x
  3. Step 3: Cross multiply
    20,977.30x = 31,400.34 × 15,681.52
  4. Step 4: Simplify right side
    20,977.30x = 492,405,059.72
  5. Step 5: Solve for x
    x = 492,405,059.72/20,977.30
  6. Step 6: Final answer
    x = 23,473.23

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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.