Home / 18,451.36-25,455.12-12,865.60

Finding the Fourth Proportional to 18,451.36, 25,455.12 and 12,865.60

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Solution

The fourth proportional to 18,451.36, 25,455.12 and 12,865.60 is: 17,749.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,451.36 : 25,455.12 = 12,865.60 : x
  2. Step 2: Convert to fraction form
    18,451.36/25,455.12 = 12,865.60/x
  3. Step 3: Cross multiply
    18,451.36x = 25,455.12 × 12,865.60
  4. Step 4: Simplify right side
    18,451.36x = 327,495,391.87
  5. Step 5: Solve for x
    x = 327,495,391.87/18,451.36
  6. Step 6: Final answer
    x = 17,749.12

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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.