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Finding the Fourth Proportional to 20,769.69, 28,699.65 and 14,790.98

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Solution

The fourth proportional to 20,769.69, 28,699.65 and 14,790.98 is: 20,438.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.69 : 28,699.65 = 14,790.98 : x
  2. Step 2: Convert to fraction form
    20,769.69/28,699.65 = 14,790.98/x
  3. Step 3: Cross multiply
    20,769.69x = 28,699.65 × 14,790.98
  4. Step 4: Simplify right side
    20,769.69x = 424,496,020.91
  5. Step 5: Solve for x
    x = 424,496,020.91/20,769.69
  6. Step 6: Final answer
    x = 20,438.24

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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.