Home / 21,027.78-29,020.38-15,713.40

Finding the Fourth Proportional to 21,027.78, 29,020.38 and 15,713.40

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Solution

The fourth proportional to 21,027.78, 29,020.38 and 15,713.40 is: 21,686.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.78 : 29,020.38 = 15,713.40 : x
  2. Step 2: Convert to fraction form
    21,027.78/29,020.38 = 15,713.40/x
  3. Step 3: Cross multiply
    21,027.78x = 29,020.38 × 15,713.40
  4. Step 4: Simplify right side
    21,027.78x = 456,008,839.09
  5. Step 5: Solve for x
    x = 456,008,839.09/21,027.78
  6. Step 6: Final answer
    x = 21,686.02

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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.