Home / 19,877.81-27,431.70-11,379.90

Finding the Fourth Proportional to 19,877.81, 27,431.70 and 11,379.90

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Solution

The fourth proportional to 19,877.81, 27,431.70 and 11,379.90 is: 15,704.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,877.81 : 27,431.70 = 11,379.90 : x
  2. Step 2: Convert to fraction form
    19,877.81/27,431.70 = 11,379.90/x
  3. Step 3: Cross multiply
    19,877.81x = 27,431.70 × 11,379.90
  4. Step 4: Simplify right side
    19,877.81x = 312,169,808.77
  5. Step 5: Solve for x
    x = 312,169,808.77/19,877.81
  6. Step 6: Final answer
    x = 15,704.44

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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.