Home / 31,427.11-47,153.72-12,720.37

Finding the Fourth Proportional to 31,427.11, 47,153.72 and 12,720.37

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Solution

The fourth proportional to 31,427.11, 47,153.72 and 12,720.37 is: 19,085.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,427.11 : 47,153.72 = 12,720.37 : x
  2. Step 2: Convert to fraction form
    31,427.11/47,153.72 = 12,720.37/x
  3. Step 3: Cross multiply
    31,427.11x = 47,153.72 × 12,720.37
  4. Step 4: Simplify right side
    31,427.11x = 599,812,765.28
  5. Step 5: Solve for x
    x = 599,812,765.28/31,427.11
  6. Step 6: Final answer
    x = 19,085.84

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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.