Home / 13,305.63-18,346.59-9,942.78

Finding the Fourth Proportional to 13,305.63, 18,346.59 and 9,942.78

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Solution

The fourth proportional to 13,305.63, 18,346.59 and 9,942.78 is: 13,709.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,305.63 : 18,346.59 = 9,942.78 : x
  2. Step 2: Convert to fraction form
    13,305.63/18,346.59 = 9,942.78/x
  3. Step 3: Cross multiply
    13,305.63x = 18,346.59 × 9,942.78
  4. Step 4: Simplify right side
    13,305.63x = 182,416,108.12
  5. Step 5: Solve for x
    x = 182,416,108.12/13,305.63
  6. Step 6: Final answer
    x = 13,709.69

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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.