Home / 13,126.70-18,114.18-7,158.32

Finding the Fourth Proportional to 13,126.70, 18,114.18 and 7,158.32

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Solution

The fourth proportional to 13,126.70, 18,114.18 and 7,158.32 is: 9,878.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.70 : 18,114.18 = 7,158.32 : x
  2. Step 2: Convert to fraction form
    13,126.70/18,114.18 = 7,158.32/x
  3. Step 3: Cross multiply
    13,126.70x = 18,114.18 × 7,158.32
  4. Step 4: Simplify right side
    13,126.70x = 129,667,096.98
  5. Step 5: Solve for x
    x = 129,667,096.98/13,126.70
  6. Step 6: Final answer
    x = 9,878.12

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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.