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Finding the Fourth Proportional to 43,619.30, 65,428.95 and 14,039.45

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Solution

The fourth proportional to 43,619.30, 65,428.95 and 14,039.45 is: 21,059.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,619.30 : 65,428.95 = 14,039.45 : x
  2. Step 2: Convert to fraction form
    43,619.30/65,428.95 = 14,039.45/x
  3. Step 3: Cross multiply
    43,619.30x = 65,428.95 × 14,039.45
  4. Step 4: Simplify right side
    43,619.30x = 918,586,074.74
  5. Step 5: Solve for x
    x = 918,586,074.74/43,619.30
  6. Step 6: Final answer
    x = 21,059.17

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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.