Home / 10,102.32-15,120.63-8,702.64

Finding the Fourth Proportional to 10,102.32, 15,120.63 and 8,702.64

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Solution

The fourth proportional to 10,102.32, 15,120.63 and 8,702.64 is: 13,025.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,102.32 : 15,120.63 = 8,702.64 : x
  2. Step 2: Convert to fraction form
    10,102.32/15,120.63 = 8,702.64/x
  3. Step 3: Cross multiply
    10,102.32x = 15,120.63 × 8,702.64
  4. Step 4: Simplify right side
    10,102.32x = 131,589,399.46
  5. Step 5: Solve for x
    x = 131,589,399.46/10,102.32
  6. Step 6: Final answer
    x = 13,025.66

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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.