Home / 13,687.81-20,537.13-4,923.40

Finding the Fourth Proportional to 13,687.81, 20,537.13 and 4,923.40

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Solution

The fourth proportional to 13,687.81, 20,537.13 and 4,923.40 is: 7,387.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.81 : 20,537.13 = 4,923.40 : x
  2. Step 2: Convert to fraction form
    13,687.81/20,537.13 = 4,923.40/x
  3. Step 3: Cross multiply
    13,687.81x = 20,537.13 × 4,923.40
  4. Step 4: Simplify right side
    13,687.81x = 101,112,505.84
  5. Step 5: Solve for x
    x = 101,112,505.84/13,687.81
  6. Step 6: Final answer
    x = 7,387.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.