Home / 21,322.20-29,431.98-12,829.08

Finding the Fourth Proportional to 21,322.20, 29,431.98 and 12,829.08

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Solution

The fourth proportional to 21,322.20, 29,431.98 and 12,829.08 is: 17,708.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.20 : 29,431.98 = 12,829.08 : x
  2. Step 2: Convert to fraction form
    21,322.20/29,431.98 = 12,829.08/x
  3. Step 3: Cross multiply
    21,322.20x = 29,431.98 × 12,829.08
  4. Step 4: Simplify right side
    21,322.20x = 377,585,225.98
  5. Step 5: Solve for x
    x = 377,585,225.98/21,322.20
  6. Step 6: Final answer
    x = 17,708.55

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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.