Home / 5,136.90-7,713.45-3,905.70

Finding the Fourth Proportional to 5,136.90, 7,713.45 and 3,905.70

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Solution

The fourth proportional to 5,136.90, 7,713.45 and 3,905.70 is: 5,864.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,136.90 : 7,713.45 = 3,905.70 : x
  2. Step 2: Convert to fraction form
    5,136.90/7,713.45 = 3,905.70/x
  3. Step 3: Cross multiply
    5,136.90x = 7,713.45 × 3,905.70
  4. Step 4: Simplify right side
    5,136.90x = 30,126,421.67
  5. Step 5: Solve for x
    x = 30,126,421.67/5,136.90
  6. Step 6: Final answer
    x = 5,864.71

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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.