Home / 15,003.60-20,705.18-8,289.38

Finding the Fourth Proportional to 15,003.60, 20,705.18 and 8,289.38

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Solution

The fourth proportional to 15,003.60, 20,705.18 and 8,289.38 is: 11,439.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,003.60 : 20,705.18 = 8,289.38 : x
  2. Step 2: Convert to fraction form
    15,003.60/20,705.18 = 8,289.38/x
  3. Step 3: Cross multiply
    15,003.60x = 20,705.18 × 8,289.38
  4. Step 4: Simplify right side
    15,003.60x = 171,633,193.02
  5. Step 5: Solve for x
    x = 171,633,193.02/15,003.60
  6. Step 6: Final answer
    x = 11,439.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.