Home / 9,356.90-12,911.45-5,379.30

Finding the Fourth Proportional to 9,356.90, 12,911.45 and 5,379.30

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Solution

The fourth proportional to 9,356.90, 12,911.45 and 5,379.30 is: 7,422.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,356.90 : 12,911.45 = 5,379.30 : x
  2. Step 2: Convert to fraction form
    9,356.90/12,911.45 = 5,379.30/x
  3. Step 3: Cross multiply
    9,356.90x = 12,911.45 × 5,379.30
  4. Step 4: Simplify right side
    9,356.90x = 69,454,536.09
  5. Step 5: Solve for x
    x = 69,454,536.09/9,356.90
  6. Step 6: Final answer
    x = 7,422.82

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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.