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Finding the Fourth Proportional to 18,820.76, 28,192.86 and 15,102.86

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Solution

The fourth proportional to 18,820.76, 28,192.86 and 15,102.86 is: 22,623.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.76 : 28,192.86 = 15,102.86 : x
  2. Step 2: Convert to fraction form
    18,820.76/28,192.86 = 15,102.86/x
  3. Step 3: Cross multiply
    18,820.76x = 28,192.86 × 15,102.86
  4. Step 4: Simplify right side
    18,820.76x = 425,792,676.62
  5. Step 5: Solve for x
    x = 425,792,676.62/18,820.76
  6. Step 6: Final answer
    x = 22,623.57

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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.