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Finding the Fourth Proportional to 14,420.45, 19,899.64 and 8,047.32

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Solution

The fourth proportional to 14,420.45, 19,899.64 and 8,047.32 is: 11,104.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,420.45 : 19,899.64 = 8,047.32 : x
  2. Step 2: Convert to fraction form
    14,420.45/19,899.64 = 8,047.32/x
  3. Step 3: Cross multiply
    14,420.45x = 19,899.64 × 8,047.32
  4. Step 4: Simplify right side
    14,420.45x = 160,138,750.85
  5. Step 5: Solve for x
    x = 160,138,750.85/14,420.45
  6. Step 6: Final answer
    x = 11,104.97

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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.