Home / 21,006.14-31,518.47-11,143.00

Finding the Fourth Proportional to 21,006.14, 31,518.47 and 11,143.00

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Solution

The fourth proportional to 21,006.14, 31,518.47 and 11,143.00 is: 16,719.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.14 : 31,518.47 = 11,143.00 : x
  2. Step 2: Convert to fraction form
    21,006.14/31,518.47 = 11,143.00/x
  3. Step 3: Cross multiply
    21,006.14x = 31,518.47 × 11,143.00
  4. Step 4: Simplify right side
    21,006.14x = 351,210,153.62
  5. Step 5: Solve for x
    x = 351,210,153.62/21,006.14
  6. Step 6: Final answer
    x = 16,719.41

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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.