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Finding the Fourth Proportional to 28,666.67, 42,999.21 and 7,606.78

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Solution

The fourth proportional to 28,666.67, 42,999.21 and 7,606.78 is: 11,409.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,666.67 : 42,999.21 = 7,606.78 : x
  2. Step 2: Convert to fraction form
    28,666.67/42,999.21 = 7,606.78/x
  3. Step 3: Cross multiply
    28,666.67x = 42,999.21 × 7,606.78
  4. Step 4: Simplify right side
    28,666.67x = 327,085,423.15
  5. Step 5: Solve for x
    x = 327,085,423.15/28,666.67
  6. Step 6: Final answer
    x = 11,409.96

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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.