Home / 20,749.05-31,115.93-7,418.45

Finding the Fourth Proportional to 20,749.05, 31,115.93 and 7,418.45

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Solution

The fourth proportional to 20,749.05, 31,115.93 and 7,418.45 is: 11,124.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.05 : 31,115.93 = 7,418.45 : x
  2. Step 2: Convert to fraction form
    20,749.05/31,115.93 = 7,418.45/x
  3. Step 3: Cross multiply
    20,749.05x = 31,115.93 × 7,418.45
  4. Step 4: Simplify right side
    20,749.05x = 230,831,953.36
  5. Step 5: Solve for x
    x = 230,831,953.36/20,749.05
  6. Step 6: Final answer
    x = 11,124.94

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1.5x scale

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.