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Finding the Fourth Proportional to 13,087.67, 18,051.84 and 8,609.99

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Solution

The fourth proportional to 13,087.67, 18,051.84 and 8,609.99 is: 11,875.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,087.67 : 18,051.84 = 8,609.99 : x
  2. Step 2: Convert to fraction form
    13,087.67/18,051.84 = 8,609.99/x
  3. Step 3: Cross multiply
    13,087.67x = 18,051.84 × 8,609.99
  4. Step 4: Simplify right side
    13,087.67x = 155,426,207.01
  5. Step 5: Solve for x
    x = 155,426,207.01/13,087.67
  6. Step 6: Final answer
    x = 11,875.77

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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.