Home / 10,142.40-15,213.63-3,122.37

Finding the Fourth Proportional to 10,142.40, 15,213.63 and 3,122.37

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Solution

The fourth proportional to 10,142.40, 15,213.63 and 3,122.37 is: 4,683.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,142.40 : 15,213.63 = 3,122.37 : x
  2. Step 2: Convert to fraction form
    10,142.40/15,213.63 = 3,122.37/x
  3. Step 3: Cross multiply
    10,142.40x = 15,213.63 × 3,122.37
  4. Step 4: Simplify right side
    10,142.40x = 47,502,581.90
  5. Step 5: Solve for x
    x = 47,502,581.90/10,142.40
  6. Step 6: Final answer
    x = 4,683.56

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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.