Home / 21,098.07-31,631.46-12,776.08

Finding the Fourth Proportional to 21,098.07, 31,631.46 and 12,776.08

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Solution

The fourth proportional to 21,098.07, 31,631.46 and 12,776.08 is: 19,154.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,098.07 : 31,631.46 = 12,776.08 : x
  2. Step 2: Convert to fraction form
    21,098.07/31,631.46 = 12,776.08/x
  3. Step 3: Cross multiply
    21,098.07x = 31,631.46 × 12,776.08
  4. Step 4: Simplify right side
    21,098.07x = 404,126,063.48
  5. Step 5: Solve for x
    x = 404,126,063.48/21,098.07
  6. Step 6: Final answer
    x = 19,154.65

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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.