Home / 20,586.80-30,803.40-18,743.60

Finding the Fourth Proportional to 20,586.80, 30,803.40 and 18,743.60

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Solution

The fourth proportional to 20,586.80, 30,803.40 and 18,743.60 is: 28,045.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.80 : 30,803.40 = 18,743.60 : x
  2. Step 2: Convert to fraction form
    20,586.80/30,803.40 = 18,743.60/x
  3. Step 3: Cross multiply
    20,586.80x = 30,803.40 × 18,743.60
  4. Step 4: Simplify right side
    20,586.80x = 577,366,608.24
  5. Step 5: Solve for x
    x = 577,366,608.24/20,586.80
  6. Step 6: Final answer
    x = 28,045.48

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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.