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Finding the Fourth Proportional to 18,749.88, 28,135.76 and 7,064.01

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Solution

The fourth proportional to 18,749.88, 28,135.76 and 7,064.01 is: 10,600.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,749.88 : 28,135.76 = 7,064.01 : x
  2. Step 2: Convert to fraction form
    18,749.88/28,135.76 = 7,064.01/x
  3. Step 3: Cross multiply
    18,749.88x = 28,135.76 × 7,064.01
  4. Step 4: Simplify right side
    18,749.88x = 198,751,254.68
  5. Step 5: Solve for x
    x = 198,751,254.68/18,749.88
  6. Step 6: Final answer
    x = 10,600.13

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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.