Home / 21,114.79-31,683.12-15,319.24

Finding the Fourth Proportional to 21,114.79, 31,683.12 and 15,319.24

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Solution

The fourth proportional to 21,114.79, 31,683.12 and 15,319.24 is: 22,986.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.79 : 31,683.12 = 15,319.24 : x
  2. Step 2: Convert to fraction form
    21,114.79/31,683.12 = 15,319.24/x
  3. Step 3: Cross multiply
    21,114.79x = 31,683.12 × 15,319.24
  4. Step 4: Simplify right side
    21,114.79x = 485,361,319.23
  5. Step 5: Solve for x
    x = 485,361,319.23/21,114.79
  6. Step 6: Final answer
    x = 22,986.79

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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.