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Finding the Fourth Proportional to 7,861.04, 11,790.84 and 2,666.32

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Solution

The fourth proportional to 7,861.04, 11,790.84 and 2,666.32 is: 3,999.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,861.04 : 11,790.84 = 2,666.32 : x
  2. Step 2: Convert to fraction form
    7,861.04/11,790.84 = 2,666.32/x
  3. Step 3: Cross multiply
    7,861.04x = 11,790.84 × 2,666.32
  4. Step 4: Simplify right side
    7,861.04x = 31,438,152.51
  5. Step 5: Solve for x
    x = 31,438,152.51/7,861.04
  6. Step 6: Final answer
    x = 3,999.24

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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.