Home / 19,987.96-27,576.80-12,918.56

Finding the Fourth Proportional to 19,987.96, 27,576.80 and 12,918.56

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Solution

The fourth proportional to 19,987.96, 27,576.80 and 12,918.56 is: 17,823.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.96 : 27,576.80 = 12,918.56 : x
  2. Step 2: Convert to fraction form
    19,987.96/27,576.80 = 12,918.56/x
  3. Step 3: Cross multiply
    19,987.96x = 27,576.80 × 12,918.56
  4. Step 4: Simplify right side
    19,987.96x = 356,252,545.41
  5. Step 5: Solve for x
    x = 356,252,545.41/19,987.96
  6. Step 6: Final answer
    x = 17,823.36

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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.