Home / 13,520.40-20,280.65-4,160.36

Finding the Fourth Proportional to 13,520.40, 20,280.65 and 4,160.36

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Solution

The fourth proportional to 13,520.40, 20,280.65 and 4,160.36 is: 6,240.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.40 : 20,280.65 = 4,160.36 : x
  2. Step 2: Convert to fraction form
    13,520.40/20,280.65 = 4,160.36/x
  3. Step 3: Cross multiply
    13,520.40x = 20,280.65 × 4,160.36
  4. Step 4: Simplify right side
    13,520.40x = 84,374,805.03
  5. Step 5: Solve for x
    x = 84,374,805.03/13,520.40
  6. Step 6: Final answer
    x = 6,240.56

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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.