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Finding the Fourth Proportional to 18,643.60, 27,962.70 and 5,495.32

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Solution

The fourth proportional to 18,643.60, 27,962.70 and 5,495.32 is: 8,242.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.60 : 27,962.70 = 5,495.32 : x
  2. Step 2: Convert to fraction form
    18,643.60/27,962.70 = 5,495.32/x
  3. Step 3: Cross multiply
    18,643.60x = 27,962.70 × 5,495.32
  4. Step 4: Simplify right side
    18,643.60x = 153,663,984.56
  5. Step 5: Solve for x
    x = 153,663,984.56/18,643.60
  6. Step 6: Final answer
    x = 8,242.18

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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.