Home / 11,136.91-15,369.04-6,421.20

Finding the Fourth Proportional to 11,136.91, 15,369.04 and 6,421.20

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Solution

The fourth proportional to 11,136.91, 15,369.04 and 6,421.20 is: 8,861.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,136.91 : 15,369.04 = 6,421.20 : x
  2. Step 2: Convert to fraction form
    11,136.91/15,369.04 = 6,421.20/x
  3. Step 3: Cross multiply
    11,136.91x = 15,369.04 × 6,421.20
  4. Step 4: Simplify right side
    11,136.91x = 98,687,679.65
  5. Step 5: Solve for x
    x = 98,687,679.65/11,136.91
  6. Step 6: Final answer
    x = 8,861.32

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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.