Home / 21,800.83-30,088.20-12,729.16

Finding the Fourth Proportional to 21,800.83, 30,088.20 and 12,729.16

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Solution

The fourth proportional to 21,800.83, 30,088.20 and 12,729.16 is: 17,568.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,800.83 : 30,088.20 = 12,729.16 : x
  2. Step 2: Convert to fraction form
    21,800.83/30,088.20 = 12,729.16/x
  3. Step 3: Cross multiply
    21,800.83x = 30,088.20 × 12,729.16
  4. Step 4: Simplify right side
    21,800.83x = 382,997,511.91
  5. Step 5: Solve for x
    x = 382,997,511.91/21,800.83
  6. Step 6: Final answer
    x = 17,568.02

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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.