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Finding the Fourth Proportional to 9,379.59, 12,943.44 and 5,130.47

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Solution

The fourth proportional to 9,379.59, 12,943.44 and 5,130.47 is: 7,079.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,379.59 : 12,943.44 = 5,130.47 : x
  2. Step 2: Convert to fraction form
    9,379.59/12,943.44 = 5,130.47/x
  3. Step 3: Cross multiply
    9,379.59x = 12,943.44 × 5,130.47
  4. Step 4: Simplify right side
    9,379.59x = 66,405,865.90
  5. Step 5: Solve for x
    x = 66,405,865.90/9,379.59
  6. Step 6: Final answer
    x = 7,079.83

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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.