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Finding the Fourth Proportional to 12,486.78, 17,228.93 and 7,450.03

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Solution

The fourth proportional to 12,486.78, 17,228.93 and 7,450.03 is: 10,279.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.78 : 17,228.93 = 7,450.03 : x
  2. Step 2: Convert to fraction form
    12,486.78/17,228.93 = 7,450.03/x
  3. Step 3: Cross multiply
    12,486.78x = 17,228.93 × 7,450.03
  4. Step 4: Simplify right side
    12,486.78x = 128,355,953.69
  5. Step 5: Solve for x
    x = 128,355,953.69/12,486.78
  6. Step 6: Final answer
    x = 10,279.35

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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.