Home / 21,160.64-29,188.40-13,616.77

Finding the Fourth Proportional to 21,160.64, 29,188.40 and 13,616.77

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Solution

The fourth proportional to 21,160.64, 29,188.40 and 13,616.77 is: 18,782.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.64 : 29,188.40 = 13,616.77 : x
  2. Step 2: Convert to fraction form
    21,160.64/29,188.40 = 13,616.77/x
  3. Step 3: Cross multiply
    21,160.64x = 29,188.40 × 13,616.77
  4. Step 4: Simplify right side
    21,160.64x = 397,451,729.47
  5. Step 5: Solve for x
    x = 397,451,729.47/21,160.64
  6. Step 6: Final answer
    x = 18,782.59

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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.