Home / 13,126.82-18,115.04-7,158.50

Finding the Fourth Proportional to 13,126.82, 18,115.04 and 7,158.50

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Solution

The fourth proportional to 13,126.82, 18,115.04 and 7,158.50 is: 9,878.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.82 : 18,115.04 = 7,158.50 : x
  2. Step 2: Convert to fraction form
    13,126.82/18,115.04 = 7,158.50/x
  3. Step 3: Cross multiply
    13,126.82x = 18,115.04 × 7,158.50
  4. Step 4: Simplify right side
    13,126.82x = 129,676,513.84
  5. Step 5: Solve for x
    x = 129,676,513.84/13,126.82
  6. Step 6: Final answer
    x = 9,878.75

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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.