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Finding the Fourth Proportional to 13,489.98, 18,607.76 and 8,708.09

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Solution

The fourth proportional to 13,489.98, 18,607.76 and 8,708.09 is: 12,011.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.98 : 18,607.76 = 8,708.09 : x
  2. Step 2: Convert to fraction form
    13,489.98/18,607.76 = 8,708.09/x
  3. Step 3: Cross multiply
    13,489.98x = 18,607.76 × 8,708.09
  4. Step 4: Simplify right side
    13,489.98x = 162,037,977.51
  5. Step 5: Solve for x
    x = 162,037,977.51/13,489.98
  6. Step 6: Final answer
    x = 12,011.73

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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.