Home / 13,106.32-18,082.12-7,800.40

Finding the Fourth Proportional to 13,106.32, 18,082.12 and 7,800.40

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Solution

The fourth proportional to 13,106.32, 18,082.12 and 7,800.40 is: 10,761.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,106.32 : 18,082.12 = 7,800.40 : x
  2. Step 2: Convert to fraction form
    13,106.32/18,082.12 = 7,800.40/x
  3. Step 3: Cross multiply
    13,106.32x = 18,082.12 × 7,800.40
  4. Step 4: Simplify right side
    13,106.32x = 141,047,768.85
  5. Step 5: Solve for x
    x = 141,047,768.85/13,106.32
  6. Step 6: Final answer
    x = 10,761.81

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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.