Home / 21,237.79-29,308.50-11,678.11

Finding the Fourth Proportional to 21,237.79, 29,308.50 and 11,678.11

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Solution

The fourth proportional to 21,237.79, 29,308.50 and 11,678.11 is: 16,115.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,237.79 : 29,308.50 = 11,678.11 : x
  2. Step 2: Convert to fraction form
    21,237.79/29,308.50 = 11,678.11/x
  3. Step 3: Cross multiply
    21,237.79x = 29,308.50 × 11,678.11
  4. Step 4: Simplify right side
    21,237.79x = 342,267,886.94
  5. Step 5: Solve for x
    x = 342,267,886.94/21,237.79
  6. Step 6: Final answer
    x = 16,115.98

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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.