Home / 13,442.34-20,148.86-12,821.36

Finding the Fourth Proportional to 13,442.34, 20,148.86 and 12,821.36

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Solution

The fourth proportional to 13,442.34, 20,148.86 and 12,821.36 is: 19,218.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,442.34 : 20,148.86 = 12,821.36 : x
  2. Step 2: Convert to fraction form
    13,442.34/20,148.86 = 12,821.36/x
  3. Step 3: Cross multiply
    13,442.34x = 20,148.86 × 12,821.36
  4. Step 4: Simplify right side
    13,442.34x = 258,335,718.96
  5. Step 5: Solve for x
    x = 258,335,718.96/13,442.34
  6. Step 6: Final answer
    x = 19,218.06

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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.