Home / 12,921.48-19,411.56-11,171.88

Finding the Fourth Proportional to 12,921.48, 19,411.56 and 11,171.88

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Solution

The fourth proportional to 12,921.48, 19,411.56 and 11,171.88 is: 16,783.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.48 : 19,411.56 = 11,171.88 : x
  2. Step 2: Convert to fraction form
    12,921.48/19,411.56 = 11,171.88/x
  3. Step 3: Cross multiply
    12,921.48x = 19,411.56 × 11,171.88
  4. Step 4: Simplify right side
    12,921.48x = 216,863,618.93
  5. Step 5: Solve for x
    x = 216,863,618.93/12,921.48
  6. Step 6: Final answer
    x = 16,783.19

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1.5x scale

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.