Home / 21,035.36-31,542.24-6,990.32

Finding the Fourth Proportional to 21,035.36, 31,542.24 and 6,990.32

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Solution

The fourth proportional to 21,035.36, 31,542.24 and 6,990.32 is: 10,481.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,035.36 : 31,542.24 = 6,990.32 : x
  2. Step 2: Convert to fraction form
    21,035.36/31,542.24 = 6,990.32/x
  3. Step 3: Cross multiply
    21,035.36x = 31,542.24 × 6,990.32
  4. Step 4: Simplify right side
    21,035.36x = 220,490,351.12
  5. Step 5: Solve for x
    x = 220,490,351.12/21,035.36
  6. Step 6: Final answer
    x = 10,481.89

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1.5x scale

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.