Home / 9,415.12-12,991.96-5,223.28

Finding the Fourth Proportional to 9,415.12, 12,991.96 and 5,223.28

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Solution

The fourth proportional to 9,415.12, 12,991.96 and 5,223.28 is: 7,207.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,415.12 : 12,991.96 = 5,223.28 : x
  2. Step 2: Convert to fraction form
    9,415.12/12,991.96 = 5,223.28/x
  3. Step 3: Cross multiply
    9,415.12x = 12,991.96 × 5,223.28
  4. Step 4: Simplify right side
    9,415.12x = 67,860,644.83
  5. Step 5: Solve for x
    x = 67,860,644.83/9,415.12
  6. Step 6: Final answer
    x = 7,207.62

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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.