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Finding the Fourth Proportional to 18,709.35, 28,039.65 and 7,603.06

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Solution

The fourth proportional to 18,709.35, 28,039.65 and 7,603.06 is: 11,394.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.35 : 28,039.65 = 7,603.06 : x
  2. Step 2: Convert to fraction form
    18,709.35/28,039.65 = 7,603.06/x
  3. Step 3: Cross multiply
    18,709.35x = 28,039.65 × 7,603.06
  4. Step 4: Simplify right side
    18,709.35x = 213,187,071.23
  5. Step 5: Solve for x
    x = 213,187,071.23/18,709.35
  6. Step 6: Final answer
    x = 11,394.68

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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.