Home / 13,618.54-20,427.09-7,999.30

Finding the Fourth Proportional to 13,618.54, 20,427.09 and 7,999.30

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Solution

The fourth proportional to 13,618.54, 20,427.09 and 7,999.30 is: 11,998.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,618.54 : 20,427.09 = 7,999.30 : x
  2. Step 2: Convert to fraction form
    13,618.54/20,427.09 = 7,999.30/x
  3. Step 3: Cross multiply
    13,618.54x = 20,427.09 × 7,999.30
  4. Step 4: Simplify right side
    13,618.54x = 163,402,421.04
  5. Step 5: Solve for x
    x = 163,402,421.04/13,618.54
  6. Step 6: Final answer
    x = 11,998.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.