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Finding the Fourth Proportional to 28,170.99, 38,875.90 and 16,234.22

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Solution

The fourth proportional to 28,170.99, 38,875.90 and 16,234.22 is: 22,403.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,170.99 : 38,875.90 = 16,234.22 : x
  2. Step 2: Convert to fraction form
    28,170.99/38,875.90 = 16,234.22/x
  3. Step 3: Cross multiply
    28,170.99x = 38,875.90 × 16,234.22
  4. Step 4: Simplify right side
    28,170.99x = 631,120,000.34
  5. Step 5: Solve for x
    x = 631,120,000.34/28,170.99
  6. Step 6: Final answer
    x = 22,403.19

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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.