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Finding the Fourth Proportional to 13,605.98, 18,776.24 and 7,637.66

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Solution

The fourth proportional to 13,605.98, 18,776.24 and 7,637.66 is: 10,539.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.98 : 18,776.24 = 7,637.66 : x
  2. Step 2: Convert to fraction form
    13,605.98/18,776.24 = 7,637.66/x
  3. Step 3: Cross multiply
    13,605.98x = 18,776.24 × 7,637.66
  4. Step 4: Simplify right side
    13,605.98x = 143,406,537.20
  5. Step 5: Solve for x
    x = 143,406,537.20/13,605.98
  6. Step 6: Final answer
    x = 10,539.96

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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.