Home / 20,246.90-30,358.20-10,405.40

Finding the Fourth Proportional to 20,246.90, 30,358.20 and 10,405.40

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Solution

The fourth proportional to 20,246.90, 30,358.20 and 10,405.40 is: 15,601.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,246.90 : 30,358.20 = 10,405.40 : x
  2. Step 2: Convert to fraction form
    20,246.90/30,358.20 = 10,405.40/x
  3. Step 3: Cross multiply
    20,246.90x = 30,358.20 × 10,405.40
  4. Step 4: Simplify right side
    20,246.90x = 315,889,214.28
  5. Step 5: Solve for x
    x = 315,889,214.28/20,246.90
  6. Step 6: Final answer
    x = 15,601.86

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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.