Home / 18,143.29-25,017.51-11,420.70

Finding the Fourth Proportional to 18,143.29, 25,017.51 and 11,420.70

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Solution

The fourth proportional to 18,143.29, 25,017.51 and 11,420.70 is: 15,747.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,143.29 : 25,017.51 = 11,420.70 : x
  2. Step 2: Convert to fraction form
    18,143.29/25,017.51 = 11,420.70/x
  3. Step 3: Cross multiply
    18,143.29x = 25,017.51 × 11,420.70
  4. Step 4: Simplify right side
    18,143.29x = 285,717,361.23
  5. Step 5: Solve for x
    x = 285,717,361.23/18,143.29
  6. Step 6: Final answer
    x = 15,747.82

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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.