Home / 12,136.72-18,218.40-10,296.40

Finding the Fourth Proportional to 12,136.72, 18,218.40 and 10,296.40

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Solution

The fourth proportional to 12,136.72, 18,218.40 and 10,296.40 is: 15,455.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,136.72 : 18,218.40 = 10,296.40 : x
  2. Step 2: Convert to fraction form
    12,136.72/18,218.40 = 10,296.40/x
  3. Step 3: Cross multiply
    12,136.72x = 18,218.40 × 10,296.40
  4. Step 4: Simplify right side
    12,136.72x = 187,583,933.76
  5. Step 5: Solve for x
    x = 187,583,933.76/12,136.72
  6. Step 6: Final answer
    x = 15,455.90

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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.