Home / 21,207.32-31,780.92-15,616.79

Finding the Fourth Proportional to 21,207.32, 31,780.92 and 15,616.79

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Solution

The fourth proportional to 21,207.32, 31,780.92 and 15,616.79 is: 23,403.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.32 : 31,780.92 = 15,616.79 : x
  2. Step 2: Convert to fraction form
    21,207.32/31,780.92 = 15,616.79/x
  3. Step 3: Cross multiply
    21,207.32x = 31,780.92 × 15,616.79
  4. Step 4: Simplify right side
    21,207.32x = 496,315,953.65
  5. Step 5: Solve for x
    x = 496,315,953.65/21,207.32
  6. Step 6: Final answer
    x = 23,403.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.