Home / 21,639.53-29,862.93-12,693.48

Finding the Fourth Proportional to 21,639.53, 29,862.93 and 12,693.48

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Solution

The fourth proportional to 21,639.53, 29,862.93 and 12,693.48 is: 17,517.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.53 : 29,862.93 = 12,693.48 : x
  2. Step 2: Convert to fraction form
    21,639.53/29,862.93 = 12,693.48/x
  3. Step 3: Cross multiply
    21,639.53x = 29,862.93 × 12,693.48
  4. Step 4: Simplify right side
    21,639.53x = 379,064,504.70
  5. Step 5: Solve for x
    x = 379,064,504.70/21,639.53
  6. Step 6: Final answer
    x = 17,517.23

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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.