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Finding the Fourth Proportional to 13,607.58, 18,777.16 and 7,637.88

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Solution

The fourth proportional to 13,607.58, 18,777.16 and 7,637.88 is: 10,539.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.58 : 18,777.16 = 7,637.88 : x
  2. Step 2: Convert to fraction form
    13,607.58/18,777.16 = 7,637.88/x
  3. Step 3: Cross multiply
    13,607.58x = 18,777.16 × 7,637.88
  4. Step 4: Simplify right side
    13,607.58x = 143,417,581.84
  5. Step 5: Solve for x
    x = 143,417,581.84/13,607.58
  6. Step 6: Final answer
    x = 10,539.54

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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.