Home / 21,208.54-31,794.56-8,720.76

Finding the Fourth Proportional to 21,208.54, 31,794.56 and 8,720.76

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Solution

The fourth proportional to 21,208.54, 31,794.56 and 8,720.76 is: 13,073.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.54 : 31,794.56 = 8,720.76 : x
  2. Step 2: Convert to fraction form
    21,208.54/31,794.56 = 8,720.76/x
  3. Step 3: Cross multiply
    21,208.54x = 31,794.56 × 8,720.76
  4. Step 4: Simplify right side
    21,208.54x = 277,272,727.07
  5. Step 5: Solve for x
    x = 277,272,727.07/21,208.54
  6. Step 6: Final answer
    x = 13,073.64

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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.