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Finding the Fourth Proportional to 12,858.39, 17,748.05 and 7,556.76

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Solution

The fourth proportional to 12,858.39, 17,748.05 and 7,556.76 is: 10,430.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,858.39 : 17,748.05 = 7,556.76 : x
  2. Step 2: Convert to fraction form
    12,858.39/17,748.05 = 7,556.76/x
  3. Step 3: Cross multiply
    12,858.39x = 17,748.05 × 7,556.76
  4. Step 4: Simplify right side
    12,858.39x = 134,117,716.53
  5. Step 5: Solve for x
    x = 134,117,716.53/12,858.39
  6. Step 6: Final answer
    x = 10,430.37

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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.