Home / 12,930.52-17,856.60-11,145.40

Finding the Fourth Proportional to 12,930.52, 17,856.60 and 11,145.40

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Solution

The fourth proportional to 12,930.52, 17,856.60 and 11,145.40 is: 15,391.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.52 : 17,856.60 = 11,145.40 : x
  2. Step 2: Convert to fraction form
    12,930.52/17,856.60 = 11,145.40/x
  3. Step 3: Cross multiply
    12,930.52x = 17,856.60 × 11,145.40
  4. Step 4: Simplify right side
    12,930.52x = 199,018,949.64
  5. Step 5: Solve for x
    x = 199,018,949.64/12,930.52
  6. Step 6: Final answer
    x = 15,391.41

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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.