Home / 21,865.58-30,173.63-12,915.95

Finding the Fourth Proportional to 21,865.58, 30,173.63 and 12,915.95

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Solution

The fourth proportional to 21,865.58, 30,173.63 and 12,915.95 is: 17,823.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,865.58 : 30,173.63 = 12,915.95 : x
  2. Step 2: Convert to fraction form
    21,865.58/30,173.63 = 12,915.95/x
  3. Step 3: Cross multiply
    21,865.58x = 30,173.63 × 12,915.95
  4. Step 4: Simplify right side
    21,865.58x = 389,721,107.25
  5. Step 5: Solve for x
    x = 389,721,107.25/21,865.58
  6. Step 6: Final answer
    x = 17,823.50

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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.