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Finding the Fourth Proportional to 15,985.92, 22,060.64 and 8,912.32

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Solution

The fourth proportional to 15,985.92, 22,060.64 and 8,912.32 is: 12,299.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,985.92 : 22,060.64 = 8,912.32 : x
  2. Step 2: Convert to fraction form
    15,985.92/22,060.64 = 8,912.32/x
  3. Step 3: Cross multiply
    15,985.92x = 22,060.64 × 8,912.32
  4. Step 4: Simplify right side
    15,985.92x = 196,611,483.08
  5. Step 5: Solve for x
    x = 196,611,483.08/15,985.92
  6. Step 6: Final answer
    x = 12,299.04

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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.