Home / 21,537.99-29,722.59-11,978.01

Finding the Fourth Proportional to 21,537.99, 29,722.59 and 11,978.01

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Solution

The fourth proportional to 21,537.99, 29,722.59 and 11,978.01 is: 16,529.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,537.99 : 29,722.59 = 11,978.01 : x
  2. Step 2: Convert to fraction form
    21,537.99/29,722.59 = 11,978.01/x
  3. Step 3: Cross multiply
    21,537.99x = 29,722.59 × 11,978.01
  4. Step 4: Simplify right side
    21,537.99x = 356,017,480.25
  5. Step 5: Solve for x
    x = 356,017,480.25/21,537.99
  6. Step 6: Final answer
    x = 16,529.74

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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.