Home / 13,179.11-18,186.73-7,870.77

Finding the Fourth Proportional to 13,179.11, 18,186.73 and 7,870.77

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Solution

The fourth proportional to 13,179.11, 18,186.73 and 7,870.77 is: 10,861.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.11 : 18,186.73 = 7,870.77 : x
  2. Step 2: Convert to fraction form
    13,179.11/18,186.73 = 7,870.77/x
  3. Step 3: Cross multiply
    13,179.11x = 18,186.73 × 7,870.77
  4. Step 4: Simplify right side
    13,179.11x = 143,143,549.21
  5. Step 5: Solve for x
    x = 143,143,549.21/13,179.11
  6. Step 6: Final answer
    x = 10,861.40

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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.