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Finding the Fourth Proportional to 28,501.33, 42,756.59 and 8,779.88

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Solution

The fourth proportional to 28,501.33, 42,756.59 and 8,779.88 is: 13,171.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,501.33 : 42,756.59 = 8,779.88 : x
  2. Step 2: Convert to fraction form
    28,501.33/42,756.59 = 8,779.88/x
  3. Step 3: Cross multiply
    28,501.33x = 42,756.59 × 8,779.88
  4. Step 4: Simplify right side
    28,501.33x = 375,397,729.41
  5. Step 5: Solve for x
    x = 375,397,729.41/28,501.33
  6. Step 6: Final answer
    x = 13,171.24

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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.