Home / 21,065.22-29,081.70-15,394.32

Finding the Fourth Proportional to 21,065.22, 29,081.70 and 15,394.32

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Solution

The fourth proportional to 21,065.22, 29,081.70 and 15,394.32 is: 21,252.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.22 : 29,081.70 = 15,394.32 : x
  2. Step 2: Convert to fraction form
    21,065.22/29,081.70 = 15,394.32/x
  3. Step 3: Cross multiply
    21,065.22x = 29,081.70 × 15,394.32
  4. Step 4: Simplify right side
    21,065.22x = 447,692,995.94
  5. Step 5: Solve for x
    x = 447,692,995.94/21,065.22
  6. Step 6: Final answer
    x = 21,252.71

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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.