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Finding the Fourth Proportional to 20,762.50, 28,653.04 and 11,810.82

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Solution

The fourth proportional to 20,762.50, 28,653.04 and 11,810.82 is: 16,299.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.50 : 28,653.04 = 11,810.82 : x
  2. Step 2: Convert to fraction form
    20,762.50/28,653.04 = 11,810.82/x
  3. Step 3: Cross multiply
    20,762.50x = 28,653.04 × 11,810.82
  4. Step 4: Simplify right side
    20,762.50x = 338,415,897.89
  5. Step 5: Solve for x
    x = 338,415,897.89/20,762.50
  6. Step 6: Final answer
    x = 16,299.38

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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.