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Finding the Fourth Proportional to 7,128.98, 10,677.90 and 3,612.95

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Solution

The fourth proportional to 7,128.98, 10,677.90 and 3,612.95 is: 5,411.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.98 : 10,677.90 = 3,612.95 : x
  2. Step 2: Convert to fraction form
    7,128.98/10,677.90 = 3,612.95/x
  3. Step 3: Cross multiply
    7,128.98x = 10,677.90 × 3,612.95
  4. Step 4: Simplify right side
    7,128.98x = 38,578,745.50
  5. Step 5: Solve for x
    x = 38,578,745.50/7,128.98
  6. Step 6: Final answer
    x = 5,411.54

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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.