Home / 13,607.72-18,777.04-7,638.08

Finding the Fourth Proportional to 13,607.72, 18,777.04 and 7,638.08

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Solution

The fourth proportional to 13,607.72, 18,777.04 and 7,638.08 is: 10,539.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.72 : 18,777.04 = 7,638.08 : x
  2. Step 2: Convert to fraction form
    13,607.72/18,777.04 = 7,638.08/x
  3. Step 3: Cross multiply
    13,607.72x = 18,777.04 × 7,638.08
  4. Step 4: Simplify right side
    13,607.72x = 143,420,533.68
  5. Step 5: Solve for x
    x = 143,420,533.68/13,607.72
  6. Step 6: Final answer
    x = 10,539.64

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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.