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Finding the Fourth Proportional to 28,505.10, 42,762.24 and 8,783.65

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Solution

The fourth proportional to 28,505.10, 42,762.24 and 8,783.65 is: 13,176.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,505.10 : 42,762.24 = 8,783.65 : x
  2. Step 2: Convert to fraction form
    28,505.10/42,762.24 = 8,783.65/x
  3. Step 3: Cross multiply
    28,505.10x = 42,762.24 × 8,783.65
  4. Step 4: Simplify right side
    28,505.10x = 375,608,362.29
  5. Step 5: Solve for x
    x = 375,608,362.29/28,505.10
  6. Step 6: Final answer
    x = 13,176.88

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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.