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Finding the Fourth Proportional to 28,807.50, 43,211.25 and 6,919.50

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Solution

The fourth proportional to 28,807.50, 43,211.25 and 6,919.50 is: 10,379.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,807.50 : 43,211.25 = 6,919.50 : x
  2. Step 2: Convert to fraction form
    28,807.50/43,211.25 = 6,919.50/x
  3. Step 3: Cross multiply
    28,807.50x = 43,211.25 × 6,919.50
  4. Step 4: Simplify right side
    28,807.50x = 299,000,244.38
  5. Step 5: Solve for x
    x = 299,000,244.38/28,807.50
  6. Step 6: Final answer
    x = 10,379.25

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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.