Home / 21,136.05-29,161.11-12,182.31

Finding the Fourth Proportional to 21,136.05, 29,161.11 and 12,182.31

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Solution

The fourth proportional to 21,136.05, 29,161.11 and 12,182.31 is: 16,807.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.05 : 29,161.11 = 12,182.31 : x
  2. Step 2: Convert to fraction form
    21,136.05/29,161.11 = 12,182.31/x
  3. Step 3: Cross multiply
    21,136.05x = 29,161.11 × 12,182.31
  4. Step 4: Simplify right side
    21,136.05x = 355,249,681.96
  5. Step 5: Solve for x
    x = 355,249,681.96/21,136.05
  6. Step 6: Final answer
    x = 16,807.76

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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.