Home / 12,215.99-16,855.08-7,180.40

Finding the Fourth Proportional to 12,215.99, 16,855.08 and 7,180.40

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Solution

The fourth proportional to 12,215.99, 16,855.08 and 7,180.40 is: 9,907.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.99 : 16,855.08 = 7,180.40 : x
  2. Step 2: Convert to fraction form
    12,215.99/16,855.08 = 7,180.40/x
  3. Step 3: Cross multiply
    12,215.99x = 16,855.08 × 7,180.40
  4. Step 4: Simplify right side
    12,215.99x = 121,026,216.43
  5. Step 5: Solve for x
    x = 121,026,216.43/12,215.99
  6. Step 6: Final answer
    x = 9,907.20

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Double scale
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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.