Home / 30,089.21-41,479.83-21,108.87

Finding the Fourth Proportional to 30,089.21, 41,479.83 and 21,108.87

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Solution

The fourth proportional to 30,089.21, 41,479.83 and 21,108.87 is: 29,099.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,089.21 : 41,479.83 = 21,108.87 : x
  2. Step 2: Convert to fraction form
    30,089.21/41,479.83 = 21,108.87/x
  3. Step 3: Cross multiply
    30,089.21x = 41,479.83 × 21,108.87
  4. Step 4: Simplify right side
    30,089.21x = 875,592,339.09
  5. Step 5: Solve for x
    x = 875,592,339.09/30,089.21
  6. Step 6: Final answer
    x = 29,099.88

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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.