Home / 11,136.15-15,369.30-6,420.42

Finding the Fourth Proportional to 11,136.15, 15,369.30 and 6,420.42

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Solution

The fourth proportional to 11,136.15, 15,369.30 and 6,420.42 is: 8,860.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,136.15 : 15,369.30 = 6,420.42 : x
  2. Step 2: Convert to fraction form
    11,136.15/15,369.30 = 6,420.42/x
  3. Step 3: Cross multiply
    11,136.15x = 15,369.30 × 6,420.42
  4. Step 4: Simplify right side
    11,136.15x = 98,677,361.11
  5. Step 5: Solve for x
    x = 98,677,361.11/11,136.15
  6. Step 6: Final answer
    x = 8,860.99

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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.