Home / 13,520.52-20,285.64-8,320.32

Finding the Fourth Proportional to 13,520.52, 20,285.64 and 8,320.32

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Solution

The fourth proportional to 13,520.52, 20,285.64 and 8,320.32 is: 12,483.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.52 : 20,285.64 = 8,320.32 : x
  2. Step 2: Convert to fraction form
    13,520.52/20,285.64 = 8,320.32/x
  3. Step 3: Cross multiply
    13,520.52x = 20,285.64 × 8,320.32
  4. Step 4: Simplify right side
    13,520.52x = 168,783,016.20
  5. Step 5: Solve for x
    x = 168,783,016.20/13,520.52
  6. Step 6: Final answer
    x = 12,483.47

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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.