Home / 21,290.15-29,378.98-12,336.05

Finding the Fourth Proportional to 21,290.15, 29,378.98 and 12,336.05

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Solution

The fourth proportional to 21,290.15, 29,378.98 and 12,336.05 is: 17,022.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.15 : 29,378.98 = 12,336.05 : x
  2. Step 2: Convert to fraction form
    21,290.15/29,378.98 = 12,336.05/x
  3. Step 3: Cross multiply
    21,290.15x = 29,378.98 × 12,336.05
  4. Step 4: Simplify right side
    21,290.15x = 362,420,566.23
  5. Step 5: Solve for x
    x = 362,420,566.23/21,290.15
  6. Step 6: Final answer
    x = 17,022.92

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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.