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Finding the Fourth Proportional to 12,857.77, 19,264.65 and 7,018.48

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Solution

The fourth proportional to 12,857.77, 19,264.65 and 7,018.48 is: 10,515.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.77 : 19,264.65 = 7,018.48 : x
  2. Step 2: Convert to fraction form
    12,857.77/19,264.65 = 7,018.48/x
  3. Step 3: Cross multiply
    12,857.77x = 19,264.65 × 7,018.48
  4. Step 4: Simplify right side
    12,857.77x = 135,208,560.73
  5. Step 5: Solve for x
    x = 135,208,560.73/12,857.77
  6. Step 6: Final answer
    x = 10,515.71

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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.