Home / 23,138.60-31,929-13,705.34

Finding the Fourth Proportional to 23,138.60, 31,929 and 13,705.34

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Solution

The fourth proportional to 23,138.60, 31,929 and 13,705.34 is: 18,912.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,138.60 : 31,929 = 13,705.34 : x
  2. Step 2: Convert to fraction form
    23,138.60/31,929 = 13,705.34/x
  3. Step 3: Cross multiply
    23,138.60x = 31,929 × 13,705.34
  4. Step 4: Simplify right side
    23,138.60x = 437,597,800.86
  5. Step 5: Solve for x
    x = 437,597,800.86/23,138.60
  6. Step 6: Final answer
    x = 18,912.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.