Home / 20,901.81-31,336.57-18,124.66

Finding the Fourth Proportional to 20,901.81, 31,336.57 and 18,124.66

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Solution

The fourth proportional to 20,901.81, 31,336.57 and 18,124.66 is: 27,172.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.81 : 31,336.57 = 18,124.66 : x
  2. Step 2: Convert to fraction form
    20,901.81/31,336.57 = 18,124.66/x
  3. Step 3: Cross multiply
    20,901.81x = 31,336.57 × 18,124.66
  4. Step 4: Simplify right side
    20,901.81x = 567,964,676.82
  5. Step 5: Solve for x
    x = 567,964,676.82/20,901.81
  6. Step 6: Final answer
    x = 27,172.99

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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.