Home / 21,286.28-31,929.75-7,054.79

Finding the Fourth Proportional to 21,286.28, 31,929.75 and 7,054.79

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Solution

The fourth proportional to 21,286.28, 31,929.75 and 7,054.79 is: 10,582.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.28 : 31,929.75 = 7,054.79 : x
  2. Step 2: Convert to fraction form
    21,286.28/31,929.75 = 7,054.79/x
  3. Step 3: Cross multiply
    21,286.28x = 31,929.75 × 7,054.79
  4. Step 4: Simplify right side
    21,286.28x = 225,257,521.35
  5. Step 5: Solve for x
    x = 225,257,521.35/21,286.28
  6. Step 6: Final answer
    x = 10,582.29

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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.