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Finding the Fourth Proportional to 13,607.16, 18,776.86 and 7,637.69

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Solution

The fourth proportional to 13,607.16, 18,776.86 and 7,637.69 is: 10,539.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.16 : 18,776.86 = 7,637.69 : x
  2. Step 2: Convert to fraction form
    13,607.16/18,776.86 = 7,637.69/x
  3. Step 3: Cross multiply
    13,607.16x = 18,776.86 × 7,637.69
  4. Step 4: Simplify right side
    13,607.16x = 143,411,741.97
  5. Step 5: Solve for x
    x = 143,411,741.97/13,607.16
  6. Step 6: Final answer
    x = 10,539.43

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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.