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Finding the Fourth Proportional to 15,898.92, 21,915.36 and 12,109.92

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Solution

The fourth proportional to 15,898.92, 21,915.36 and 12,109.92 is: 16,692.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,898.92 : 21,915.36 = 12,109.92 : x
  2. Step 2: Convert to fraction form
    15,898.92/21,915.36 = 12,109.92/x
  3. Step 3: Cross multiply
    15,898.92x = 21,915.36 × 12,109.92
  4. Step 4: Simplify right side
    15,898.92x = 265,393,256.37
  5. Step 5: Solve for x
    x = 265,393,256.37/15,898.92
  6. Step 6: Final answer
    x = 16,692.53

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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.