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Finding the Fourth Proportional to 28,538.78, 42,810.21 and 8,814.78

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Solution

The fourth proportional to 28,538.78, 42,810.21 and 8,814.78 is: 13,222.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,538.78 : 42,810.21 = 8,814.78 : x
  2. Step 2: Convert to fraction form
    28,538.78/42,810.21 = 8,814.78/x
  3. Step 3: Cross multiply
    28,538.78x = 42,810.21 × 8,814.78
  4. Step 4: Simplify right side
    28,538.78x = 377,362,582.90
  5. Step 5: Solve for x
    x = 377,362,582.90/28,538.78
  6. Step 6: Final answer
    x = 13,222.80

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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.