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Finding the Fourth Proportional to 15,865.44, 21,893.58 and 8,695.32

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Solution

The fourth proportional to 15,865.44, 21,893.58 and 8,695.32 is: 11,999.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,865.44 : 21,893.58 = 8,695.32 : x
  2. Step 2: Convert to fraction form
    15,865.44/21,893.58 = 8,695.32/x
  3. Step 3: Cross multiply
    15,865.44x = 21,893.58 × 8,695.32
  4. Step 4: Simplify right side
    15,865.44x = 190,371,684.05
  5. Step 5: Solve for x
    x = 190,371,684.05/15,865.44
  6. Step 6: Final answer
    x = 11,999.14

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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.