Home / 21,053.73-31,487.64-18,730.11

Finding the Fourth Proportional to 21,053.73, 31,487.64 and 18,730.11

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Solution

The fourth proportional to 21,053.73, 31,487.64 and 18,730.11 is: 28,012.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,053.73 : 31,487.64 = 18,730.11 : x
  2. Step 2: Convert to fraction form
    21,053.73/31,487.64 = 18,730.11/x
  3. Step 3: Cross multiply
    21,053.73x = 31,487.64 × 18,730.11
  4. Step 4: Simplify right side
    21,053.73x = 589,766,960.84
  5. Step 5: Solve for x
    x = 589,766,960.84/21,053.73
  6. Step 6: Final answer
    x = 28,012.47

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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.