Home / 12,218.87-16,858.17-7,181.48

Finding the Fourth Proportional to 12,218.87, 16,858.17 and 7,181.48

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Solution

The fourth proportional to 12,218.87, 16,858.17 and 7,181.48 is: 9,908.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.87 : 16,858.17 = 7,181.48 : x
  2. Step 2: Convert to fraction form
    12,218.87/16,858.17 = 7,181.48/x
  3. Step 3: Cross multiply
    12,218.87x = 16,858.17 × 7,181.48
  4. Step 4: Simplify right side
    12,218.87x = 121,066,526.40
  5. Step 5: Solve for x
    x = 121,066,526.40/12,218.87
  6. Step 6: Final answer
    x = 9,908.16

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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.