Home / 20,101.78-30,148.35-12,696.36

Finding the Fourth Proportional to 20,101.78, 30,148.35 and 12,696.36

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Solution

The fourth proportional to 20,101.78, 30,148.35 and 12,696.36 is: 19,041.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,101.78 : 30,148.35 = 12,696.36 : x
  2. Step 2: Convert to fraction form
    20,101.78/30,148.35 = 12,696.36/x
  3. Step 3: Cross multiply
    20,101.78x = 30,148.35 × 12,696.36
  4. Step 4: Simplify right side
    20,101.78x = 382,774,305.01
  5. Step 5: Solve for x
    x = 382,774,305.01/20,101.78
  6. Step 6: Final answer
    x = 19,041.81

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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.