Home / 13,115.08-18,093.39-9,138.50

Finding the Fourth Proportional to 13,115.08, 18,093.39 and 9,138.50

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Solution

The fourth proportional to 13,115.08, 18,093.39 and 9,138.50 is: 12,607.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.08 : 18,093.39 = 9,138.50 : x
  2. Step 2: Convert to fraction form
    13,115.08/18,093.39 = 9,138.50/x
  3. Step 3: Cross multiply
    13,115.08x = 18,093.39 × 9,138.50
  4. Step 4: Simplify right side
    13,115.08x = 165,346,387.63
  5. Step 5: Solve for x
    x = 165,346,387.63/13,115.08
  6. Step 6: Final answer
    x = 12,607.35

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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.