Home / 21,005.25-31,512.78-7,154.25

Finding the Fourth Proportional to 21,005.25, 31,512.78 and 7,154.25

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Solution

The fourth proportional to 21,005.25, 31,512.78 and 7,154.25 is: 10,733.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.25 : 31,512.78 = 7,154.25 : x
  2. Step 2: Convert to fraction form
    21,005.25/31,512.78 = 7,154.25/x
  3. Step 3: Cross multiply
    21,005.25x = 31,512.78 × 7,154.25
  4. Step 4: Simplify right side
    21,005.25x = 225,450,306.32
  5. Step 5: Solve for x
    x = 225,450,306.32/21,005.25
  6. Step 6: Final answer
    x = 10,733.05

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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.