Home / 13,345.91-20,018.62-3,985.95

Finding the Fourth Proportional to 13,345.91, 20,018.62 and 3,985.95

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Solution

The fourth proportional to 13,345.91, 20,018.62 and 3,985.95 is: 5,978.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.91 : 20,018.62 = 3,985.95 : x
  2. Step 2: Convert to fraction form
    13,345.91/20,018.62 = 3,985.95/x
  3. Step 3: Cross multiply
    13,345.91x = 20,018.62 × 3,985.95
  4. Step 4: Simplify right side
    13,345.91x = 79,793,218.39
  5. Step 5: Solve for x
    x = 79,793,218.39/13,345.91
  6. Step 6: Final answer
    x = 5,978.85

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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.