Home / 13,181.76-18,190.80-7,876.32

Finding the Fourth Proportional to 13,181.76, 18,190.80 and 7,876.32

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Solution

The fourth proportional to 13,181.76, 18,190.80 and 7,876.32 is: 10,869.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.76 : 18,190.80 = 7,876.32 : x
  2. Step 2: Convert to fraction form
    13,181.76/18,190.80 = 7,876.32/x
  3. Step 3: Cross multiply
    13,181.76x = 18,190.80 × 7,876.32
  4. Step 4: Simplify right side
    13,181.76x = 143,276,561.86
  5. Step 5: Solve for x
    x = 143,276,561.86/13,181.76
  6. Step 6: Final answer
    x = 10,869.30

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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.