Home / 20,895.56-31,371.13-12,136.76

Finding the Fourth Proportional to 20,895.56, 31,371.13 and 12,136.76

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Solution

The fourth proportional to 20,895.56, 31,371.13 and 12,136.76 is: 18,221.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,895.56 : 31,371.13 = 12,136.76 : x
  2. Step 2: Convert to fraction form
    20,895.56/31,371.13 = 12,136.76/x
  3. Step 3: Cross multiply
    20,895.56x = 31,371.13 × 12,136.76
  4. Step 4: Simplify right side
    20,895.56x = 380,743,875.74
  5. Step 5: Solve for x
    x = 380,743,875.74/20,895.56
  6. Step 6: Final answer
    x = 18,221.28

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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.