Home / 30,974.78-42,749.03-18,399.58

Finding the Fourth Proportional to 30,974.78, 42,749.03 and 18,399.58

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Solution

The fourth proportional to 30,974.78, 42,749.03 and 18,399.58 is: 25,393.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,974.78 : 42,749.03 = 18,399.58 : x
  2. Step 2: Convert to fraction form
    30,974.78/42,749.03 = 18,399.58/x
  3. Step 3: Cross multiply
    30,974.78x = 42,749.03 × 18,399.58
  4. Step 4: Simplify right side
    30,974.78x = 786,564,197.41
  5. Step 5: Solve for x
    x = 786,564,197.41/30,974.78
  6. Step 6: Final answer
    x = 25,393.70

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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.