Home / 21,195-31,778.46-10,103.40

Finding the Fourth Proportional to 21,195, 31,778.46 and 10,103.40

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Solution

The fourth proportional to 21,195, 31,778.46 and 10,103.40 is: 15,148.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195 : 31,778.46 = 10,103.40 : x
  2. Step 2: Convert to fraction form
    21,195/31,778.46 = 10,103.40/x
  3. Step 3: Cross multiply
    21,195x = 31,778.46 × 10,103.40
  4. Step 4: Simplify right side
    21,195x = 321,070,492.76
  5. Step 5: Solve for x
    x = 321,070,492.76/21,195
  6. Step 6: Final answer
    x = 15,148.41

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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.