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Finding the Fourth Proportional to 43,240.38, 64,866 and 13,653.90

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Solution

The fourth proportional to 43,240.38, 64,866 and 13,653.90 is: 20,482.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,240.38 : 64,866 = 13,653.90 : x
  2. Step 2: Convert to fraction form
    43,240.38/64,866 = 13,653.90/x
  3. Step 3: Cross multiply
    43,240.38x = 64,866 × 13,653.90
  4. Step 4: Simplify right side
    43,240.38x = 885,673,877.40
  5. Step 5: Solve for x
    x = 885,673,877.40/43,240.38
  6. Step 6: Final answer
    x = 20,482.56

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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.