Home / 12,218.40-16,861.08-6,629.28

Finding the Fourth Proportional to 12,218.40, 16,861.08 and 6,629.28

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Solution

The fourth proportional to 12,218.40, 16,861.08 and 6,629.28 is: 9,148.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.40 : 16,861.08 = 6,629.28 : x
  2. Step 2: Convert to fraction form
    12,218.40/16,861.08 = 6,629.28/x
  3. Step 3: Cross multiply
    12,218.40x = 16,861.08 × 6,629.28
  4. Step 4: Simplify right side
    12,218.40x = 111,776,820.42
  5. Step 5: Solve for x
    x = 111,776,820.42/12,218.40
  6. Step 6: Final answer
    x = 9,148.24

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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.