Home / 20,916.36-31,382.37-12,602.25

Finding the Fourth Proportional to 20,916.36, 31,382.37 and 12,602.25

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Solution

The fourth proportional to 20,916.36, 31,382.37 and 12,602.25 is: 18,908.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.36 : 31,382.37 = 12,602.25 : x
  2. Step 2: Convert to fraction form
    20,916.36/31,382.37 = 12,602.25/x
  3. Step 3: Cross multiply
    20,916.36x = 31,382.37 × 12,602.25
  4. Step 4: Simplify right side
    20,916.36x = 395,488,472.33
  5. Step 5: Solve for x
    x = 395,488,472.33/20,916.36
  6. Step 6: Final answer
    x = 18,908.09

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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.