Home / 20,187.40-30,270.30-8,487.40

Finding the Fourth Proportional to 20,187.40, 30,270.30 and 8,487.40

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Solution

The fourth proportional to 20,187.40, 30,270.30 and 8,487.40 is: 12,726.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.40 : 30,270.30 = 8,487.40 : x
  2. Step 2: Convert to fraction form
    20,187.40/30,270.30 = 8,487.40/x
  3. Step 3: Cross multiply
    20,187.40x = 30,270.30 × 8,487.40
  4. Step 4: Simplify right side
    20,187.40x = 256,916,144.22
  5. Step 5: Solve for x
    x = 256,916,144.22/20,187.40
  6. Step 6: Final answer
    x = 12,726.56

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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.