Home / 13,280.20-18,326.32-7,311.88

Finding the Fourth Proportional to 13,280.20, 18,326.32 and 7,311.88

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Solution

The fourth proportional to 13,280.20, 18,326.32 and 7,311.88 is: 10,090.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.20 : 18,326.32 = 7,311.88 : x
  2. Step 2: Convert to fraction form
    13,280.20/18,326.32 = 7,311.88/x
  3. Step 3: Cross multiply
    13,280.20x = 18,326.32 × 7,311.88
  4. Step 4: Simplify right side
    13,280.20x = 133,999,852.68
  5. Step 5: Solve for x
    x = 133,999,852.68/13,280.20
  6. Step 6: Final answer
    x = 10,090.20

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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.