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Finding the Fourth Proportional to 13,705.16, 20,555.58 and 4,469

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Solution

The fourth proportional to 13,705.16, 20,555.58 and 4,469 is: 6,702.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,705.16 : 20,555.58 = 4,469 : x
  2. Step 2: Convert to fraction form
    13,705.16/20,555.58 = 4,469/x
  3. Step 3: Cross multiply
    13,705.16x = 20,555.58 × 4,469
  4. Step 4: Simplify right side
    13,705.16x = 91,862,887.02
  5. Step 5: Solve for x
    x = 91,862,887.02/13,705.16
  6. Step 6: Final answer
    x = 6,702.80

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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.