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Finding the Fourth Proportional to 18,687.13, 28,030.62 and 6,208.09

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Solution

The fourth proportional to 18,687.13, 28,030.62 and 6,208.09 is: 9,312.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.13 : 28,030.62 = 6,208.09 : x
  2. Step 2: Convert to fraction form
    18,687.13/28,030.62 = 6,208.09/x
  3. Step 3: Cross multiply
    18,687.13x = 28,030.62 × 6,208.09
  4. Step 4: Simplify right side
    18,687.13x = 174,016,611.72
  5. Step 5: Solve for x
    x = 174,016,611.72/18,687.13
  6. Step 6: Final answer
    x = 9,312.11

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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.