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Finding the Fourth Proportional to 18,999.86, 28,498.35 and 6,679.22

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Solution

The fourth proportional to 18,999.86, 28,498.35 and 6,679.22 is: 10,018.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.86 : 28,498.35 = 6,679.22 : x
  2. Step 2: Convert to fraction form
    18,999.86/28,498.35 = 6,679.22/x
  3. Step 3: Cross multiply
    18,999.86x = 28,498.35 × 6,679.22
  4. Step 4: Simplify right side
    18,999.86x = 190,346,749.29
  5. Step 5: Solve for x
    x = 190,346,749.29/18,999.86
  6. Step 6: Final answer
    x = 10,018.32

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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.