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Finding the Fourth Proportional to 20,501.15, 30,751.70 and 15,827.99

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Solution

The fourth proportional to 20,501.15, 30,751.70 and 15,827.99 is: 23,741.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,501.15 : 30,751.70 = 15,827.99 : x
  2. Step 2: Convert to fraction form
    20,501.15/30,751.70 = 15,827.99/x
  3. Step 3: Cross multiply
    20,501.15x = 30,751.70 × 15,827.99
  4. Step 4: Simplify right side
    20,501.15x = 486,737,367.18
  5. Step 5: Solve for x
    x = 486,737,367.18/20,501.15
  6. Step 6: Final answer
    x = 23,741.96

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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.