Home / 21,000.25-31,500.51-5,418.01

Finding the Fourth Proportional to 21,000.25, 31,500.51 and 5,418.01

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Solution

The fourth proportional to 21,000.25, 31,500.51 and 5,418.01 is: 8,127.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.25 : 31,500.51 = 5,418.01 : x
  2. Step 2: Convert to fraction form
    21,000.25/31,500.51 = 5,418.01/x
  3. Step 3: Cross multiply
    21,000.25x = 31,500.51 × 5,418.01
  4. Step 4: Simplify right side
    21,000.25x = 170,670,078.19
  5. Step 5: Solve for x
    x = 170,670,078.19/21,000.25
  6. Step 6: Final answer
    x = 8,127.05

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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.