Home / 13,905.08-20,856.90-3,516.92

Finding the Fourth Proportional to 13,905.08, 20,856.90 and 3,516.92

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Solution

The fourth proportional to 13,905.08, 20,856.90 and 3,516.92 is: 5,275.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.08 : 20,856.90 = 3,516.92 : x
  2. Step 2: Convert to fraction form
    13,905.08/20,856.90 = 3,516.92/x
  3. Step 3: Cross multiply
    13,905.08x = 20,856.90 × 3,516.92
  4. Step 4: Simplify right side
    13,905.08x = 73,352,048.75
  5. Step 5: Solve for x
    x = 73,352,048.75/13,905.08
  6. Step 6: Final answer
    x = 5,275.20

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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.