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Finding the Fourth Proportional to 8,675.56, 12,943.49 and 7,578.28

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Solution

The fourth proportional to 8,675.56, 12,943.49 and 7,578.28 is: 11,306.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,675.56 : 12,943.49 = 7,578.28 : x
  2. Step 2: Convert to fraction form
    8,675.56/12,943.49 = 7,578.28/x
  3. Step 3: Cross multiply
    8,675.56x = 12,943.49 × 7,578.28
  4. Step 4: Simplify right side
    8,675.56x = 98,089,391.40
  5. Step 5: Solve for x
    x = 98,089,391.40/8,675.56
  6. Step 6: Final answer
    x = 11,306.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.