Home / 21,436.30-29,583.66-12,940.50

Finding the Fourth Proportional to 21,436.30, 29,583.66 and 12,940.50

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Solution

The fourth proportional to 21,436.30, 29,583.66 and 12,940.50 is: 17,858.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,436.30 : 29,583.66 = 12,940.50 : x
  2. Step 2: Convert to fraction form
    21,436.30/29,583.66 = 12,940.50/x
  3. Step 3: Cross multiply
    21,436.30x = 29,583.66 × 12,940.50
  4. Step 4: Simplify right side
    21,436.30x = 382,827,352.23
  5. Step 5: Solve for x
    x = 382,827,352.23/21,436.30
  6. Step 6: Final answer
    x = 17,858.84

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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.