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Finding the Fourth Proportional to 13,605.01, 18,774.76 and 7,636.53

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Solution

The fourth proportional to 13,605.01, 18,774.76 and 7,636.53 is: 10,538.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.01 : 18,774.76 = 7,636.53 : x
  2. Step 2: Convert to fraction form
    13,605.01/18,774.76 = 7,636.53/x
  3. Step 3: Cross multiply
    13,605.01x = 18,774.76 × 7,636.53
  4. Step 4: Simplify right side
    13,605.01x = 143,373,999.49
  5. Step 5: Solve for x
    x = 143,373,999.49/13,605.01
  6. Step 6: Final answer
    x = 10,538.32

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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.