Home / 12,876.54-19,287.23-9,721.79

Finding the Fourth Proportional to 12,876.54, 19,287.23 and 9,721.79

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Solution

The fourth proportional to 12,876.54, 19,287.23 and 9,721.79 is: 14,561.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,876.54 : 19,287.23 = 9,721.79 : x
  2. Step 2: Convert to fraction form
    12,876.54/19,287.23 = 9,721.79/x
  3. Step 3: Cross multiply
    12,876.54x = 19,287.23 × 9,721.79
  4. Step 4: Simplify right side
    12,876.54x = 187,506,327.02
  5. Step 5: Solve for x
    x = 187,506,327.02/12,876.54
  6. Step 6: Final answer
    x = 14,561.86

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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.