Home / 21,518.89-29,687.75-15,867.01

Finding the Fourth Proportional to 21,518.89, 29,687.75 and 15,867.01

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Solution

The fourth proportional to 21,518.89, 29,687.75 and 15,867.01 is: 21,890.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518.89 : 29,687.75 = 15,867.01 : x
  2. Step 2: Convert to fraction form
    21,518.89/29,687.75 = 15,867.01/x
  3. Step 3: Cross multiply
    21,518.89x = 29,687.75 × 15,867.01
  4. Step 4: Simplify right side
    21,518.89x = 471,055,843.40
  5. Step 5: Solve for x
    x = 471,055,843.40/21,518.89
  6. Step 6: Final answer
    x = 21,890.34

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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.