Home / 11,165.40-15,408.21-6,129.51

Finding the Fourth Proportional to 11,165.40, 15,408.21 and 6,129.51

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Solution

The fourth proportional to 11,165.40, 15,408.21 and 6,129.51 is: 8,458.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,165.40 : 15,408.21 = 6,129.51 : x
  2. Step 2: Convert to fraction form
    11,165.40/15,408.21 = 6,129.51/x
  3. Step 3: Cross multiply
    11,165.40x = 15,408.21 × 6,129.51
  4. Step 4: Simplify right side
    11,165.40x = 94,444,777.28
  5. Step 5: Solve for x
    x = 94,444,777.28/11,165.40
  6. Step 6: Final answer
    x = 8,458.70

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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.