Home / 13,518.12-18,659.46-7,929

Finding the Fourth Proportional to 13,518.12, 18,659.46 and 7,929

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Solution

The fourth proportional to 13,518.12, 18,659.46 and 7,929 is: 10,944.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.12 : 18,659.46 = 7,929 : x
  2. Step 2: Convert to fraction form
    13,518.12/18,659.46 = 7,929/x
  3. Step 3: Cross multiply
    13,518.12x = 18,659.46 × 7,929
  4. Step 4: Simplify right side
    13,518.12x = 147,950,858.34
  5. Step 5: Solve for x
    x = 147,950,858.34/13,518.12
  6. Step 6: Final answer
    x = 10,944.63

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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.