Home / 13,138.40-18,132.56-7,474.07

Finding the Fourth Proportional to 13,138.40, 18,132.56 and 7,474.07

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Solution

The fourth proportional to 13,138.40, 18,132.56 and 7,474.07 is: 10,315.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.40 : 18,132.56 = 7,474.07 : x
  2. Step 2: Convert to fraction form
    13,138.40/18,132.56 = 7,474.07/x
  3. Step 3: Cross multiply
    13,138.40x = 18,132.56 × 7,474.07
  4. Step 4: Simplify right side
    13,138.40x = 135,524,058.71
  5. Step 5: Solve for x
    x = 135,524,058.71/13,138.40
  6. Step 6: Final answer
    x = 10,315.11

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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.