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Finding the Fourth Proportional to 15,643.44, 21,587.94 and 8,569.88

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Solution

The fourth proportional to 15,643.44, 21,587.94 and 8,569.88 is: 11,826.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,643.44 : 21,587.94 = 8,569.88 : x
  2. Step 2: Convert to fraction form
    15,643.44/21,587.94 = 8,569.88/x
  3. Step 3: Cross multiply
    15,643.44x = 21,587.94 × 8,569.88
  4. Step 4: Simplify right side
    15,643.44x = 185,006,055.25
  5. Step 5: Solve for x
    x = 185,006,055.25/15,643.44
  6. Step 6: Final answer
    x = 11,826.43

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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.