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Finding the Fourth Proportional to 28,246.50, 42,369.75 and 9,778.50

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Solution

The fourth proportional to 28,246.50, 42,369.75 and 9,778.50 is: 14,667.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,246.50 : 42,369.75 = 9,778.50 : x
  2. Step 2: Convert to fraction form
    28,246.50/42,369.75 = 9,778.50/x
  3. Step 3: Cross multiply
    28,246.50x = 42,369.75 × 9,778.50
  4. Step 4: Simplify right side
    28,246.50x = 414,312,600.38
  5. Step 5: Solve for x
    x = 414,312,600.38/28,246.50
  6. Step 6: Final answer
    x = 14,667.75

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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.