Home / 12,756.12-17,607.12-7,720.36

Finding the Fourth Proportional to 12,756.12, 17,607.12 and 7,720.36

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Solution

The fourth proportional to 12,756.12, 17,607.12 and 7,720.36 is: 10,656.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,756.12 : 17,607.12 = 7,720.36 : x
  2. Step 2: Convert to fraction form
    12,756.12/17,607.12 = 7,720.36/x
  3. Step 3: Cross multiply
    12,756.12x = 17,607.12 × 7,720.36
  4. Step 4: Simplify right side
    12,756.12x = 135,933,304.96
  5. Step 5: Solve for x
    x = 135,933,304.96/12,756.12
  6. Step 6: Final answer
    x = 10,656.32

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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.