Home / 21,829.08-30,126.78-12,399.96

Finding the Fourth Proportional to 21,829.08, 30,126.78 and 12,399.96

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Solution

The fourth proportional to 21,829.08, 30,126.78 and 12,399.96 is: 17,113.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,829.08 : 30,126.78 = 12,399.96 : x
  2. Step 2: Convert to fraction form
    21,829.08/30,126.78 = 12,399.96/x
  3. Step 3: Cross multiply
    21,829.08x = 30,126.78 × 12,399.96
  4. Step 4: Simplify right side
    21,829.08x = 373,570,866.93
  5. Step 5: Solve for x
    x = 373,570,866.93/21,829.08
  6. Step 6: Final answer
    x = 17,113.45

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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.