Home / 10,142.28-15,214.88-3,122.88

Finding the Fourth Proportional to 10,142.28, 15,214.88 and 3,122.88

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Solution

The fourth proportional to 10,142.28, 15,214.88 and 3,122.88 is: 4,684.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,142.28 : 15,214.88 = 3,122.88 : x
  2. Step 2: Convert to fraction form
    10,142.28/15,214.88 = 3,122.88/x
  3. Step 3: Cross multiply
    10,142.28x = 15,214.88 × 3,122.88
  4. Step 4: Simplify right side
    10,142.28x = 47,514,228.84
  5. Step 5: Solve for x
    x = 47,514,228.84/10,142.28
  6. Step 6: Final answer
    x = 4,684.77

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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.