Home / 13,415.20-20,099.96-8,728.08

Finding the Fourth Proportional to 13,415.20, 20,099.96 and 8,728.08

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Solution

The fourth proportional to 13,415.20, 20,099.96 and 8,728.08 is: 13,077.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.20 : 20,099.96 = 8,728.08 : x
  2. Step 2: Convert to fraction form
    13,415.20/20,099.96 = 8,728.08/x
  3. Step 3: Cross multiply
    13,415.20x = 20,099.96 × 8,728.08
  4. Step 4: Simplify right side
    13,415.20x = 175,434,058.88
  5. Step 5: Solve for x
    x = 175,434,058.88/13,415.20
  6. Step 6: Final answer
    x = 13,077.26

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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.