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Finding the Fourth Proportional to 12,495.88, 18,749.28 and 6,645.64

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Solution

The fourth proportional to 12,495.88, 18,749.28 and 6,645.64 is: 9,971.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,495.88 : 18,749.28 = 6,645.64 : x
  2. Step 2: Convert to fraction form
    12,495.88/18,749.28 = 6,645.64/x
  3. Step 3: Cross multiply
    12,495.88x = 18,749.28 × 6,645.64
  4. Step 4: Simplify right side
    12,495.88x = 124,600,965.14
  5. Step 5: Solve for x
    x = 124,600,965.14/12,495.88
  6. Step 6: Final answer
    x = 9,971.36

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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.