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Finding the Fourth Proportional to 12,755.80, 19,133.70 and 9,645.40

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Solution

The fourth proportional to 12,755.80, 19,133.70 and 9,645.40 is: 14,468.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,755.80 : 19,133.70 = 9,645.40 : x
  2. Step 2: Convert to fraction form
    12,755.80/19,133.70 = 9,645.40/x
  3. Step 3: Cross multiply
    12,755.80x = 19,133.70 × 9,645.40
  4. Step 4: Simplify right side
    12,755.80x = 184,552,189.98
  5. Step 5: Solve for x
    x = 184,552,189.98/12,755.80
  6. Step 6: Final answer
    x = 14,468.10

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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.