Home / 21,539.99-29,725.35-11,980.01

Finding the Fourth Proportional to 21,539.99, 29,725.35 and 11,980.01

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Solution

The fourth proportional to 21,539.99, 29,725.35 and 11,980.01 is: 16,532.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,539.99 : 29,725.35 = 11,980.01 : x
  2. Step 2: Convert to fraction form
    21,539.99/29,725.35 = 11,980.01/x
  3. Step 3: Cross multiply
    21,539.99x = 29,725.35 × 11,980.01
  4. Step 4: Simplify right side
    21,539.99x = 356,109,990.25
  5. Step 5: Solve for x
    x = 356,109,990.25/21,539.99
  6. Step 6: Final answer
    x = 16,532.50

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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.