Home / 18,220.53-25,145.40-11,148.30

Finding the Fourth Proportional to 18,220.53, 25,145.40 and 11,148.30

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Solution

The fourth proportional to 18,220.53, 25,145.40 and 11,148.30 is: 15,385.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.53 : 25,145.40 = 11,148.30 : x
  2. Step 2: Convert to fraction form
    18,220.53/25,145.40 = 11,148.30/x
  3. Step 3: Cross multiply
    18,220.53x = 25,145.40 × 11,148.30
  4. Step 4: Simplify right side
    18,220.53x = 280,328,462.82
  5. Step 5: Solve for x
    x = 280,328,462.82/18,220.53
  6. Step 6: Final answer
    x = 15,385.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.