Home / 19,988.91-27,566.85-12,907.89

Finding the Fourth Proportional to 19,988.91, 27,566.85 and 12,907.89

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Solution

The fourth proportional to 19,988.91, 27,566.85 and 12,907.89 is: 17,801.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,988.91 : 27,566.85 = 12,907.89 : x
  2. Step 2: Convert to fraction form
    19,988.91/27,566.85 = 12,907.89/x
  3. Step 3: Cross multiply
    19,988.91x = 27,566.85 × 12,907.89
  4. Step 4: Simplify right side
    19,988.91x = 355,829,867.45
  5. Step 5: Solve for x
    x = 355,829,867.45/19,988.91
  6. Step 6: Final answer
    x = 17,801.36

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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.