Home / 21,730.32-29,988.18-12,778.02

Finding the Fourth Proportional to 21,730.32, 29,988.18 and 12,778.02

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Solution

The fourth proportional to 21,730.32, 29,988.18 and 12,778.02 is: 17,633.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730.32 : 29,988.18 = 12,778.02 : x
  2. Step 2: Convert to fraction form
    21,730.32/29,988.18 = 12,778.02/x
  3. Step 3: Cross multiply
    21,730.32x = 29,988.18 × 12,778.02
  4. Step 4: Simplify right side
    21,730.32x = 383,189,563.80
  5. Step 5: Solve for x
    x = 383,189,563.80/21,730.32
  6. Step 6: Final answer
    x = 17,633.87

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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.