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Finding the Fourth Proportional to 13,607.51, 18,780.43 and 8,305.41

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Solution

The fourth proportional to 13,607.51, 18,780.43 and 8,305.41 is: 11,462.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.51 : 18,780.43 = 8,305.41 : x
  2. Step 2: Convert to fraction form
    13,607.51/18,780.43 = 8,305.41/x
  3. Step 3: Cross multiply
    13,607.51x = 18,780.43 × 8,305.41
  4. Step 4: Simplify right side
    13,607.51x = 155,979,171.13
  5. Step 5: Solve for x
    x = 155,979,171.13/13,607.51
  6. Step 6: Final answer
    x = 11,462.73

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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.