Home / 21,880.63-30,191.91-12,320.02

Finding the Fourth Proportional to 21,880.63, 30,191.91 and 12,320.02

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Solution

The fourth proportional to 21,880.63, 30,191.91 and 12,320.02 is: 16,999.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,880.63 : 30,191.91 = 12,320.02 : x
  2. Step 2: Convert to fraction form
    21,880.63/30,191.91 = 12,320.02/x
  3. Step 3: Cross multiply
    21,880.63x = 30,191.91 × 12,320.02
  4. Step 4: Simplify right side
    21,880.63x = 371,965,115.44
  5. Step 5: Solve for x
    x = 371,965,115.44/21,880.63
  6. Step 6: Final answer
    x = 16,999.74

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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.