Home / 20,631.76-30,886.67-15,389.75

Finding the Fourth Proportional to 20,631.76, 30,886.67 and 15,389.75

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Solution

The fourth proportional to 20,631.76, 30,886.67 and 15,389.75 is: 23,039.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.76 : 30,886.67 = 15,389.75 : x
  2. Step 2: Convert to fraction form
    20,631.76/30,886.67 = 15,389.75/x
  3. Step 3: Cross multiply
    20,631.76x = 30,886.67 × 15,389.75
  4. Step 4: Simplify right side
    20,631.76x = 475,338,245.32
  5. Step 5: Solve for x
    x = 475,338,245.32/20,631.76
  6. Step 6: Final answer
    x = 23,039.15

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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.