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Finding the Fourth Proportional to 9,379.50, 12,944.00 and 5,130.79

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Solution

The fourth proportional to 9,379.50, 12,944.00 and 5,130.79 is: 7,080.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,379.50 : 12,944.00 = 5,130.79 : x
  2. Step 2: Convert to fraction form
    9,379.50/12,944.00 = 5,130.79/x
  3. Step 3: Cross multiply
    9,379.50x = 12,944.00 × 5,130.79
  4. Step 4: Simplify right side
    9,379.50x = 66,412,999.04
  5. Step 5: Solve for x
    x = 66,412,999.04/9,379.50
  6. Step 6: Final answer
    x = 7,080.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.