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Finding the Fourth Proportional to 12,860.55, 17,745.66 and 7,557.08

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Solution

The fourth proportional to 12,860.55, 17,745.66 and 7,557.08 is: 10,427.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,860.55 : 17,745.66 = 7,557.08 : x
  2. Step 2: Convert to fraction form
    12,860.55/17,745.66 = 7,557.08/x
  3. Step 3: Cross multiply
    12,860.55x = 17,745.66 × 7,557.08
  4. Step 4: Simplify right side
    12,860.55x = 134,105,283.54
  5. Step 5: Solve for x
    x = 134,105,283.54/12,860.55
  6. Step 6: Final answer
    x = 10,427.65

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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.