Home / 21,521.86-29,698.81-11,961.16

Finding the Fourth Proportional to 21,521.86, 29,698.81 and 11,961.16

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Solution

The fourth proportional to 21,521.86, 29,698.81 and 11,961.16 is: 16,505.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.86 : 29,698.81 = 11,961.16 : x
  2. Step 2: Convert to fraction form
    21,521.86/29,698.81 = 11,961.16/x
  3. Step 3: Cross multiply
    21,521.86x = 29,698.81 × 11,961.16
  4. Step 4: Simplify right side
    21,521.86x = 355,232,218.22
  5. Step 5: Solve for x
    x = 355,232,218.22/21,521.86
  6. Step 6: Final answer
    x = 16,505.65

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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.