Home / 13,320.16-18,371.40-8,540.54

Finding the Fourth Proportional to 13,320.16, 18,371.40 and 8,540.54

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Solution

The fourth proportional to 13,320.16, 18,371.40 and 8,540.54 is: 11,779.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.16 : 18,371.40 = 8,540.54 : x
  2. Step 2: Convert to fraction form
    13,320.16/18,371.40 = 8,540.54/x
  3. Step 3: Cross multiply
    13,320.16x = 18,371.40 × 8,540.54
  4. Step 4: Simplify right side
    13,320.16x = 156,901,676.56
  5. Step 5: Solve for x
    x = 156,901,676.56/13,320.16
  6. Step 6: Final answer
    x = 11,779.26

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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.