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Finding the Fourth Proportional to 14,420.28, 19,899.84 and 8,134.68

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Solution

The fourth proportional to 14,420.28, 19,899.84 and 8,134.68 is: 11,225.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,420.28 : 19,899.84 = 8,134.68 : x
  2. Step 2: Convert to fraction form
    14,420.28/19,899.84 = 8,134.68/x
  3. Step 3: Cross multiply
    14,420.28x = 19,899.84 × 8,134.68
  4. Step 4: Simplify right side
    14,420.28x = 161,878,830.45
  5. Step 5: Solve for x
    x = 161,878,830.45/14,420.28
  6. Step 6: Final answer
    x = 11,225.78

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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.