Home / 7,218.40-10,808.16-6,343.60

Finding the Fourth Proportional to 7,218.40, 10,808.16 and 6,343.60

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Solution

The fourth proportional to 7,218.40, 10,808.16 and 6,343.60 is: 9,498.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.40 : 10,808.16 = 6,343.60 : x
  2. Step 2: Convert to fraction form
    7,218.40/10,808.16 = 6,343.60/x
  3. Step 3: Cross multiply
    7,218.40x = 10,808.16 × 6,343.60
  4. Step 4: Simplify right side
    7,218.40x = 68,562,643.78
  5. Step 5: Solve for x
    x = 68,562,643.78/7,218.40
  6. Step 6: Final answer
    x = 9,498.32

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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.