Home / 31,720.75-47,583.36-12,745.40

Finding the Fourth Proportional to 31,720.75, 47,583.36 and 12,745.40

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Solution

The fourth proportional to 31,720.75, 47,583.36 and 12,745.40 is: 19,118.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.75 : 47,583.36 = 12,745.40 : x
  2. Step 2: Convert to fraction form
    31,720.75/47,583.36 = 12,745.40/x
  3. Step 3: Cross multiply
    31,720.75x = 47,583.36 × 12,745.40
  4. Step 4: Simplify right side
    31,720.75x = 606,468,718.63
  5. Step 5: Solve for x
    x = 606,468,718.63/31,720.75
  6. Step 6: Final answer
    x = 19,118.99

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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.