Home / 21,415.12-29,554.44-11,983.60

Finding the Fourth Proportional to 21,415.12, 29,554.44 and 11,983.60

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Solution

The fourth proportional to 21,415.12, 29,554.44 and 11,983.60 is: 16,538.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.12 : 29,554.44 = 11,983.60 : x
  2. Step 2: Convert to fraction form
    21,415.12/29,554.44 = 11,983.60/x
  3. Step 3: Cross multiply
    21,415.12x = 29,554.44 × 11,983.60
  4. Step 4: Simplify right side
    21,415.12x = 354,168,587.18
  5. Step 5: Solve for x
    x = 354,168,587.18/21,415.12
  6. Step 6: Final answer
    x = 16,538.25

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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.