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Finding the Fourth Proportional to 28,919.75, 43,379.63 and 7,031.75

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Solution

The fourth proportional to 28,919.75, 43,379.63 and 7,031.75 is: 10,547.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.75 : 43,379.63 = 7,031.75 : x
  2. Step 2: Convert to fraction form
    28,919.75/43,379.63 = 7,031.75/x
  3. Step 3: Cross multiply
    28,919.75x = 43,379.63 × 7,031.75
  4. Step 4: Simplify right side
    28,919.75x = 305,034,713.25
  5. Step 5: Solve for x
    x = 305,034,713.25/28,919.75
  6. Step 6: Final answer
    x = 10,547.63

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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.