Home / 13,129.65-18,119.34-7,464.21

Finding the Fourth Proportional to 13,129.65, 18,119.34 and 7,464.21

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Solution

The fourth proportional to 13,129.65, 18,119.34 and 7,464.21 is: 10,300.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.65 : 18,119.34 = 7,464.21 : x
  2. Step 2: Convert to fraction form
    13,129.65/18,119.34 = 7,464.21/x
  3. Step 3: Cross multiply
    13,129.65x = 18,119.34 × 7,464.21
  4. Step 4: Simplify right side
    13,129.65x = 135,246,558.82
  5. Step 5: Solve for x
    x = 135,246,558.82/13,129.65
  6. Step 6: Final answer
    x = 10,300.85

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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.