Home / 11,681.45-16,120.43-7,489.70

Finding the Fourth Proportional to 11,681.45, 16,120.43 and 7,489.70

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Solution

The fourth proportional to 11,681.45, 16,120.43 and 7,489.70 is: 10,335.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,681.45 : 16,120.43 = 7,489.70 : x
  2. Step 2: Convert to fraction form
    11,681.45/16,120.43 = 7,489.70/x
  3. Step 3: Cross multiply
    11,681.45x = 16,120.43 × 7,489.70
  4. Step 4: Simplify right side
    11,681.45x = 120,737,184.57
  5. Step 5: Solve for x
    x = 120,737,184.57/11,681.45
  6. Step 6: Final answer
    x = 10,335.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.