Home / 13,015.65-17,960.31-7,709.43

Finding the Fourth Proportional to 13,015.65, 17,960.31 and 7,709.43

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Solution

The fourth proportional to 13,015.65, 17,960.31 and 7,709.43 is: 10,638.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,015.65 : 17,960.31 = 7,709.43 : x
  2. Step 2: Convert to fraction form
    13,015.65/17,960.31 = 7,709.43/x
  3. Step 3: Cross multiply
    13,015.65x = 17,960.31 × 7,709.43
  4. Step 4: Simplify right side
    13,015.65x = 138,463,752.72
  5. Step 5: Solve for x
    x = 138,463,752.72/13,015.65
  6. Step 6: Final answer
    x = 10,638.25

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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.