Home / 21,393.09-29,520.93-12,439.95

Finding the Fourth Proportional to 21,393.09, 29,520.93 and 12,439.95

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Solution

The fourth proportional to 21,393.09, 29,520.93 and 12,439.95 is: 17,166.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,393.09 : 29,520.93 = 12,439.95 : x
  2. Step 2: Convert to fraction form
    21,393.09/29,520.93 = 12,439.95/x
  3. Step 3: Cross multiply
    21,393.09x = 29,520.93 × 12,439.95
  4. Step 4: Simplify right side
    21,393.09x = 367,238,893.15
  5. Step 5: Solve for x
    x = 367,238,893.15/21,393.09
  6. Step 6: Final answer
    x = 17,166.24

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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.