Home / 21,830.08-30,128.16-12,400.96

Finding the Fourth Proportional to 21,830.08, 30,128.16 and 12,400.96

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Solution

The fourth proportional to 21,830.08, 30,128.16 and 12,400.96 is: 17,114.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,830.08 : 30,128.16 = 12,400.96 : x
  2. Step 2: Convert to fraction form
    21,830.08/30,128.16 = 12,400.96/x
  3. Step 3: Cross multiply
    21,830.08x = 30,128.16 × 12,400.96
  4. Step 4: Simplify right side
    21,830.08x = 373,618,107.03
  5. Step 5: Solve for x
    x = 373,618,107.03/21,830.08
  6. Step 6: Final answer
    x = 17,114.83

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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.