Home / 15,820.80-21,847.20-12,699.84

Finding the Fourth Proportional to 15,820.80, 21,847.20 and 12,699.84

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Solution

The fourth proportional to 15,820.80, 21,847.20 and 12,699.84 is: 17,537.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,820.80 : 21,847.20 = 12,699.84 : x
  2. Step 2: Convert to fraction form
    15,820.80/21,847.20 = 12,699.84/x
  3. Step 3: Cross multiply
    15,820.80x = 21,847.20 × 12,699.84
  4. Step 4: Simplify right side
    15,820.80x = 277,455,944.45
  5. Step 5: Solve for x
    x = 277,455,944.45/15,820.80
  6. Step 6: Final answer
    x = 17,537.42

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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.