Home / 12,218.40-18,330.60-5,643.20

Finding the Fourth Proportional to 12,218.40, 18,330.60 and 5,643.20

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Solution

The fourth proportional to 12,218.40, 18,330.60 and 5,643.20 is: 8,466.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.40 : 18,330.60 = 5,643.20 : x
  2. Step 2: Convert to fraction form
    12,218.40/18,330.60 = 5,643.20/x
  3. Step 3: Cross multiply
    12,218.40x = 18,330.60 × 5,643.20
  4. Step 4: Simplify right side
    12,218.40x = 103,443,241.92
  5. Step 5: Solve for x
    x = 103,443,241.92/12,218.40
  6. Step 6: Final answer
    x = 8,466.19

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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.