Home / 20,392.30-28,141.46-11,317.84

Finding the Fourth Proportional to 20,392.30, 28,141.46 and 11,317.84

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Solution

The fourth proportional to 20,392.30, 28,141.46 and 11,317.84 is: 15,618.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.30 : 28,141.46 = 11,317.84 : x
  2. Step 2: Convert to fraction form
    20,392.30/28,141.46 = 11,317.84/x
  3. Step 3: Cross multiply
    20,392.30x = 28,141.46 × 11,317.84
  4. Step 4: Simplify right side
    20,392.30x = 318,500,541.65
  5. Step 5: Solve for x
    x = 318,500,541.65/20,392.30
  6. Step 6: Final answer
    x = 15,618.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.