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Finding the Fourth Proportional to 30,379.74, 45,578.07 and 9,320.47

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Solution

The fourth proportional to 30,379.74, 45,578.07 and 9,320.47 is: 13,983.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,379.74 : 45,578.07 = 9,320.47 : x
  2. Step 2: Convert to fraction form
    30,379.74/45,578.07 = 9,320.47/x
  3. Step 3: Cross multiply
    30,379.74x = 45,578.07 × 9,320.47
  4. Step 4: Simplify right side
    30,379.74x = 424,809,034.09
  5. Step 5: Solve for x
    x = 424,809,034.09/30,379.74
  6. Step 6: Final answer
    x = 13,983.30

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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.