Home / 13,705.20-20,559.02-5,385.69

Finding the Fourth Proportional to 13,705.20, 20,559.02 and 5,385.69

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Solution

The fourth proportional to 13,705.20, 20,559.02 and 5,385.69 is: 8,079.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,705.20 : 20,559.02 = 5,385.69 : x
  2. Step 2: Convert to fraction form
    13,705.20/20,559.02 = 5,385.69/x
  3. Step 3: Cross multiply
    13,705.20x = 20,559.02 × 5,385.69
  4. Step 4: Simplify right side
    13,705.20x = 110,724,481.50
  5. Step 5: Solve for x
    x = 110,724,481.50/13,705.20
  6. Step 6: Final answer
    x = 8,079.01

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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.