Home / 20,719.49-31,110.39-12,436.58

Finding the Fourth Proportional to 20,719.49, 31,110.39 and 12,436.58

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Solution

The fourth proportional to 20,719.49, 31,110.39 and 12,436.58 is: 18,673.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.49 : 31,110.39 = 12,436.58 : x
  2. Step 2: Convert to fraction form
    20,719.49/31,110.39 = 12,436.58/x
  3. Step 3: Cross multiply
    20,719.49x = 31,110.39 × 12,436.58
  4. Step 4: Simplify right side
    20,719.49x = 386,906,698.51
  5. Step 5: Solve for x
    x = 386,906,698.51/20,719.49
  6. Step 6: Final answer
    x = 18,673.57

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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.