Home / 19,717.84-27,240.30-12,928

Finding the Fourth Proportional to 19,717.84, 27,240.30 and 12,928

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Solution

The fourth proportional to 19,717.84, 27,240.30 and 12,928 is: 17,860.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,717.84 : 27,240.30 = 12,928 : x
  2. Step 2: Convert to fraction form
    19,717.84/27,240.30 = 12,928/x
  3. Step 3: Cross multiply
    19,717.84x = 27,240.30 × 12,928
  4. Step 4: Simplify right side
    19,717.84x = 352,162,598.40
  5. Step 5: Solve for x
    x = 352,162,598.40/19,717.84
  6. Step 6: Final answer
    x = 17,860.10

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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.