Home / 21,026.47-31,504.00-12,688.97

Finding the Fourth Proportional to 21,026.47, 31,504.00 and 12,688.97

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Solution

The fourth proportional to 21,026.47, 31,504.00 and 12,688.97 is: 19,011.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,026.47 : 31,504.00 = 12,688.97 : x
  2. Step 2: Convert to fraction form
    21,026.47/31,504.00 = 12,688.97/x
  3. Step 3: Cross multiply
    21,026.47x = 31,504.00 × 12,688.97
  4. Step 4: Simplify right side
    21,026.47x = 399,753,097.85
  5. Step 5: Solve for x
    x = 399,753,097.85/21,026.47
  6. Step 6: Final answer
    x = 19,011.90

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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.