Home / 21,147.05-31,710.63-12,264.90

Finding the Fourth Proportional to 21,147.05, 31,710.63 and 12,264.90

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Solution

The fourth proportional to 21,147.05, 31,710.63 and 12,264.90 is: 18,391.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.05 : 31,710.63 = 12,264.90 : x
  2. Step 2: Convert to fraction form
    21,147.05/31,710.63 = 12,264.90/x
  3. Step 3: Cross multiply
    21,147.05x = 31,710.63 × 12,264.90
  4. Step 4: Simplify right side
    21,147.05x = 388,927,705.89
  5. Step 5: Solve for x
    x = 388,927,705.89/21,147.05
  6. Step 6: Final answer
    x = 18,391.58

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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.