Home / 21,155.64-29,199.99-12,208.47

Finding the Fourth Proportional to 21,155.64, 29,199.99 and 12,208.47

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Solution

The fourth proportional to 21,155.64, 29,199.99 and 12,208.47 is: 16,850.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.64 : 29,199.99 = 12,208.47 : x
  2. Step 2: Convert to fraction form
    21,155.64/29,199.99 = 12,208.47/x
  3. Step 3: Cross multiply
    21,155.64x = 29,199.99 × 12,208.47
  4. Step 4: Simplify right side
    21,155.64x = 356,487,201.92
  5. Step 5: Solve for x
    x = 356,487,201.92/21,155.64
  6. Step 6: Final answer
    x = 16,850.69

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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.