Home / 20,765.36-31,146.99-11,423.63

Finding the Fourth Proportional to 20,765.36, 31,146.99 and 11,423.63

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Solution

The fourth proportional to 20,765.36, 31,146.99 and 11,423.63 is: 17,134.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.36 : 31,146.99 = 11,423.63 : x
  2. Step 2: Convert to fraction form
    20,765.36/31,146.99 = 11,423.63/x
  3. Step 3: Cross multiply
    20,765.36x = 31,146.99 × 11,423.63
  4. Step 4: Simplify right side
    20,765.36x = 355,811,689.37
  5. Step 5: Solve for x
    x = 355,811,689.37/20,765.36
  6. Step 6: Final answer
    x = 17,134.87

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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.