Home / 13,742.80-18,965.10-7,455.18

Finding the Fourth Proportional to 13,742.80, 18,965.10 and 7,455.18

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Solution

The fourth proportional to 13,742.80, 18,965.10 and 7,455.18 is: 10,288.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,742.80 : 18,965.10 = 7,455.18 : x
  2. Step 2: Convert to fraction form
    13,742.80/18,965.10 = 7,455.18/x
  3. Step 3: Cross multiply
    13,742.80x = 18,965.10 × 7,455.18
  4. Step 4: Simplify right side
    13,742.80x = 141,388,234.22
  5. Step 5: Solve for x
    x = 141,388,234.22/13,742.80
  6. Step 6: Final answer
    x = 10,288.17

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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.