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Finding the Fourth Proportional to 12,857.70, 17,749.40 and 7,552.86

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Solution

The fourth proportional to 12,857.70, 17,749.40 and 7,552.86 is: 10,426.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.70 : 17,749.40 = 7,552.86 : x
  2. Step 2: Convert to fraction form
    12,857.70/17,749.40 = 7,552.86/x
  3. Step 3: Cross multiply
    12,857.70x = 17,749.40 × 7,552.86
  4. Step 4: Simplify right side
    12,857.70x = 134,058,733.28
  5. Step 5: Solve for x
    x = 134,058,733.28/12,857.70
  6. Step 6: Final answer
    x = 10,426.34

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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.